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1 | /* |
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2 | * libev event processing core, watcher management |
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3 | * |
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4 | * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without modifica- |
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8 | * tion, are permitted provided that the following conditions are met: |
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9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | * Alternatively, the contents of this file may be used under the terms of |
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29 | * the GNU General Public License ("GPL") version 2 or any later version, |
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30 | * in which case the provisions of the GPL are applicable instead of |
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31 | * the above. If you wish to allow the use of your version of this file |
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32 | * only under the terms of the GPL and not to allow others to use your |
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33 | * version of this file under the BSD license, indicate your decision |
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34 | * by deleting the provisions above and replace them with the notice |
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35 | * and other provisions required by the GPL. If you do not delete the |
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36 | * provisions above, a recipient may use your version of this file under |
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37 | * either the BSD or the GPL. |
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38 | */ |
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39 | |
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40 | #ifdef __cplusplus |
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41 | extern "C" { |
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42 | #endif |
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43 | |
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44 | /* this big block deduces configuration from config.h */ |
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45 | #ifndef EV_STANDALONE |
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46 | # ifdef EV_CONFIG_H |
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47 | # include EV_CONFIG_H |
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48 | # else |
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49 | # include "config.h" |
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50 | # endif |
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51 | |
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52 | # if HAVE_CLOCK_SYSCALL |
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53 | # ifndef EV_USE_CLOCK_SYSCALL |
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54 | # define EV_USE_CLOCK_SYSCALL 1 |
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55 | # ifndef EV_USE_REALTIME |
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56 | # define EV_USE_REALTIME 0 |
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57 | # endif |
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58 | # ifndef EV_USE_MONOTONIC |
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59 | # define EV_USE_MONOTONIC 1 |
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60 | # endif |
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61 | # endif |
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62 | # elif !defined(EV_USE_CLOCK_SYSCALL) |
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63 | # define EV_USE_CLOCK_SYSCALL 0 |
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64 | # endif |
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65 | |
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66 | # if HAVE_CLOCK_GETTIME |
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67 | # ifndef EV_USE_MONOTONIC |
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68 | # define EV_USE_MONOTONIC 1 |
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69 | # endif |
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70 | # ifndef EV_USE_REALTIME |
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71 | # define EV_USE_REALTIME 0 |
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72 | # endif |
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73 | # else |
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74 | # ifndef EV_USE_MONOTONIC |
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75 | # define EV_USE_MONOTONIC 0 |
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76 | # endif |
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77 | # ifndef EV_USE_REALTIME |
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78 | # define EV_USE_REALTIME 0 |
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79 | # endif |
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80 | # endif |
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81 | |
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82 | # ifndef EV_USE_NANOSLEEP |
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83 | # if HAVE_NANOSLEEP |
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84 | # define EV_USE_NANOSLEEP EV_FEATURE_OS |
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85 | # else |
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86 | # define EV_USE_NANOSLEEP 0 |
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87 | # endif |
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88 | # endif |
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89 | |
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90 | # ifndef EV_USE_SELECT |
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91 | # if HAVE_SELECT && HAVE_SYS_SELECT_H |
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92 | # define EV_USE_SELECT EV_FEATURE_BACKENDS |
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93 | # else |
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94 | # define EV_USE_SELECT 0 |
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95 | # endif |
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96 | # endif |
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97 | |
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98 | # ifndef EV_USE_POLL |
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99 | # if HAVE_POLL && HAVE_POLL_H |
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100 | # define EV_USE_POLL EV_FEATURE_BACKENDS |
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101 | # else |
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102 | # define EV_USE_POLL 0 |
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103 | # endif |
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104 | # endif |
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105 | |
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106 | # ifndef EV_USE_EPOLL |
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107 | # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H |
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108 | # define EV_USE_EPOLL EV_FEATURE_BACKENDS |
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109 | # else |
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110 | # define EV_USE_EPOLL 0 |
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111 | # endif |
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112 | # endif |
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113 | |
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114 | # ifndef EV_USE_KQUEUE |
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115 | # if HAVE_KQUEUE && HAVE_SYS_EVENT_H |
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116 | # define EV_USE_KQUEUE EV_FEATURE_BACKENDS |
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117 | # else |
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118 | # define EV_USE_KQUEUE 0 |
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119 | # endif |
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120 | # endif |
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121 | |
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122 | # ifndef EV_USE_PORT |
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123 | # if HAVE_PORT_H && HAVE_PORT_CREATE |
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124 | # define EV_USE_PORT EV_FEATURE_BACKENDS |
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125 | # else |
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126 | # define EV_USE_PORT 0 |
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127 | # endif |
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128 | # endif |
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129 | |
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130 | # ifndef EV_USE_INOTIFY |
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131 | # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H |
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132 | # define EV_USE_INOTIFY EV_FEATURE_OS |
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133 | # else |
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134 | # define EV_USE_INOTIFY 0 |
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135 | # endif |
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136 | # endif |
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137 | |
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138 | # ifndef EV_USE_SIGNALFD |
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139 | # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H |
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140 | # define EV_USE_SIGNALFD EV_FEATURE_OS |
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141 | # else |
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142 | # define EV_USE_SIGNALFD 0 |
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143 | # endif |
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144 | # endif |
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145 | |
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146 | # ifndef EV_USE_EVENTFD |
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147 | # if HAVE_EVENTFD |
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148 | # define EV_USE_EVENTFD EV_FEATURE_OS |
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149 | # else |
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150 | # define EV_USE_EVENTFD 0 |
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151 | # endif |
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152 | # endif |
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153 | |
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154 | #endif |
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155 | |
1 | #include <math.h> |
156 | #include <math.h> |
2 | #include <stdlib.h> |
157 | #include <stdlib.h> |
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158 | #include <string.h> |
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159 | #include <fcntl.h> |
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160 | #include <stddef.h> |
3 | |
161 | |
4 | #include <stdio.h> |
162 | #include <stdio.h> |
5 | |
163 | |
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164 | #include <assert.h> |
6 | #include <errno.h> |
165 | #include <errno.h> |
7 | #include <sys/time.h> |
166 | #include <sys/types.h> |
8 | #include <time.h> |
167 | #include <time.h> |
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168 | #include <limits.h> |
9 | |
169 | |
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170 | #include <signal.h> |
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171 | |
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172 | #ifdef EV_H |
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173 | # include EV_H |
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174 | #else |
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175 | # include "ev.h" |
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176 | #endif |
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177 | |
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178 | #ifndef _WIN32 |
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179 | # include <sys/time.h> |
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180 | # include <sys/wait.h> |
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181 | # include <unistd.h> |
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182 | #else |
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183 | # include <io.h> |
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184 | # define WIN32_LEAN_AND_MEAN |
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185 | # include <windows.h> |
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186 | # ifndef EV_SELECT_IS_WINSOCKET |
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187 | # define EV_SELECT_IS_WINSOCKET 1 |
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188 | # endif |
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189 | # undef EV_AVOID_STDIO |
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190 | #endif |
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191 | |
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192 | /* this block tries to deduce configuration from header-defined symbols and defaults */ |
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193 | |
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194 | /* try to deduce the maximum number of signals on this platform */ |
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195 | #if defined (EV_NSIG) |
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196 | /* use what's provided */ |
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197 | #elif defined (NSIG) |
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198 | # define EV_NSIG (NSIG) |
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199 | #elif defined(_NSIG) |
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200 | # define EV_NSIG (_NSIG) |
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201 | #elif defined (SIGMAX) |
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202 | # define EV_NSIG (SIGMAX+1) |
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203 | #elif defined (SIG_MAX) |
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204 | # define EV_NSIG (SIG_MAX+1) |
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205 | #elif defined (_SIG_MAX) |
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206 | # define EV_NSIG (_SIG_MAX+1) |
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207 | #elif defined (MAXSIG) |
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208 | # define EV_NSIG (MAXSIG+1) |
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209 | #elif defined (MAX_SIG) |
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210 | # define EV_NSIG (MAX_SIG+1) |
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211 | #elif defined (SIGARRAYSIZE) |
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212 | # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ |
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213 | #elif defined (_sys_nsig) |
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214 | # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ |
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215 | #else |
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216 | # error "unable to find value for NSIG, please report" |
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217 | /* to make it compile regardless, just remove the above line, */ |
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218 | /* but consider reporting it, too! :) */ |
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219 | # define EV_NSIG 65 |
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220 | #endif |
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221 | |
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222 | #ifndef EV_USE_CLOCK_SYSCALL |
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223 | # if __linux && __GLIBC__ >= 2 |
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224 | # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS |
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225 | # else |
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226 | # define EV_USE_CLOCK_SYSCALL 0 |
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227 | # endif |
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228 | #endif |
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229 | |
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230 | #ifndef EV_USE_MONOTONIC |
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231 | # if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 |
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232 | # define EV_USE_MONOTONIC EV_FEATURE_OS |
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233 | # else |
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234 | # define EV_USE_MONOTONIC 0 |
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235 | # endif |
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236 | #endif |
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237 | |
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238 | #ifndef EV_USE_REALTIME |
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239 | # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL |
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240 | #endif |
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241 | |
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242 | #ifndef EV_USE_NANOSLEEP |
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243 | # if _POSIX_C_SOURCE >= 199309L |
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244 | # define EV_USE_NANOSLEEP EV_FEATURE_OS |
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245 | # else |
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246 | # define EV_USE_NANOSLEEP 0 |
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247 | # endif |
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248 | #endif |
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249 | |
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250 | #ifndef EV_USE_SELECT |
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251 | # define EV_USE_SELECT EV_FEATURE_BACKENDS |
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252 | #endif |
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253 | |
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254 | #ifndef EV_USE_POLL |
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255 | # ifdef _WIN32 |
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256 | # define EV_USE_POLL 0 |
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257 | # else |
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258 | # define EV_USE_POLL EV_FEATURE_BACKENDS |
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259 | # endif |
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260 | #endif |
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261 | |
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262 | #ifndef EV_USE_EPOLL |
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263 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) |
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264 | # define EV_USE_EPOLL EV_FEATURE_BACKENDS |
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265 | # else |
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266 | # define EV_USE_EPOLL 0 |
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267 | # endif |
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268 | #endif |
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269 | |
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270 | #ifndef EV_USE_KQUEUE |
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271 | # define EV_USE_KQUEUE 0 |
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272 | #endif |
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273 | |
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274 | #ifndef EV_USE_PORT |
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275 | # define EV_USE_PORT 0 |
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276 | #endif |
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277 | |
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278 | #ifndef EV_USE_INOTIFY |
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279 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) |
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280 | # define EV_USE_INOTIFY EV_FEATURE_OS |
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281 | # else |
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282 | # define EV_USE_INOTIFY 0 |
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283 | # endif |
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284 | #endif |
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285 | |
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286 | #ifndef EV_PID_HASHSIZE |
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287 | # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1 |
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288 | #endif |
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289 | |
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290 | #ifndef EV_INOTIFY_HASHSIZE |
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291 | # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1 |
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292 | #endif |
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293 | |
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294 | #ifndef EV_USE_EVENTFD |
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295 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
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296 | # define EV_USE_EVENTFD EV_FEATURE_OS |
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297 | # else |
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298 | # define EV_USE_EVENTFD 0 |
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299 | # endif |
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300 | #endif |
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301 | |
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302 | #ifndef EV_USE_SIGNALFD |
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303 | # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) |
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304 | # define EV_USE_SIGNALFD EV_FEATURE_OS |
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305 | # else |
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306 | # define EV_USE_SIGNALFD 0 |
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307 | # endif |
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308 | #endif |
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309 | |
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310 | #if 0 /* debugging */ |
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311 | # define EV_VERIFY 3 |
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312 | # define EV_USE_4HEAP 1 |
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313 | # define EV_HEAP_CACHE_AT 1 |
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314 | #endif |
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315 | |
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316 | #ifndef EV_VERIFY |
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317 | # define EV_VERIFY (EV_FEATURE_API ? 1 : 0) |
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318 | #endif |
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319 | |
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320 | #ifndef EV_USE_4HEAP |
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321 | # define EV_USE_4HEAP EV_FEATURE_DATA |
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322 | #endif |
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323 | |
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324 | #ifndef EV_HEAP_CACHE_AT |
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325 | # define EV_HEAP_CACHE_AT EV_FEATURE_DATA |
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326 | #endif |
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327 | |
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328 | /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ |
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329 | /* which makes programs even slower. might work on other unices, too. */ |
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330 | #if EV_USE_CLOCK_SYSCALL |
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331 | # include <syscall.h> |
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332 | # ifdef SYS_clock_gettime |
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333 | # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) |
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334 | # undef EV_USE_MONOTONIC |
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335 | # define EV_USE_MONOTONIC 1 |
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336 | # else |
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337 | # undef EV_USE_CLOCK_SYSCALL |
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338 | # define EV_USE_CLOCK_SYSCALL 0 |
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339 | # endif |
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340 | #endif |
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341 | |
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342 | /* this block fixes any misconfiguration where we know we run into trouble otherwise */ |
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343 | |
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344 | #ifdef _AIX |
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345 | /* AIX has a completely broken poll.h header */ |
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346 | # undef EV_USE_POLL |
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347 | # define EV_USE_POLL 0 |
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348 | #endif |
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349 | |
10 | #ifdef CLOCK_MONOTONIC |
350 | #ifndef CLOCK_MONOTONIC |
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351 | # undef EV_USE_MONOTONIC |
11 | # define HAVE_MONOTONIC 1 |
352 | # define EV_USE_MONOTONIC 0 |
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353 | #endif |
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354 | |
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355 | #ifndef CLOCK_REALTIME |
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356 | # undef EV_USE_REALTIME |
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357 | # define EV_USE_REALTIME 0 |
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358 | #endif |
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359 | |
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360 | #if !EV_STAT_ENABLE |
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361 | # undef EV_USE_INOTIFY |
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362 | # define EV_USE_INOTIFY 0 |
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363 | #endif |
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364 | |
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365 | #if !EV_USE_NANOSLEEP |
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366 | # ifndef _WIN32 |
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367 | # include <sys/select.h> |
12 | #endif |
368 | # endif |
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369 | #endif |
13 | |
370 | |
14 | #define HAVE_EPOLL 1 |
371 | #if EV_USE_INOTIFY |
15 | #define HAVE_REALTIME 1 |
372 | # include <sys/utsname.h> |
16 | #define HAVE_SELECT 0 |
373 | # include <sys/statfs.h> |
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374 | # include <sys/inotify.h> |
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375 | /* some very old inotify.h headers don't have IN_DONT_FOLLOW */ |
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376 | # ifndef IN_DONT_FOLLOW |
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377 | # undef EV_USE_INOTIFY |
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378 | # define EV_USE_INOTIFY 0 |
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379 | # endif |
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380 | #endif |
17 | |
381 | |
18 | #define MAX_BLOCKTIME 60. |
382 | #if EV_SELECT_IS_WINSOCKET |
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383 | # include <winsock.h> |
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384 | #endif |
19 | |
385 | |
20 | #include "ev.h" |
386 | #if EV_USE_EVENTFD |
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387 | /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
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388 | # include <stdint.h> |
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389 | # ifndef EFD_NONBLOCK |
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390 | # define EFD_NONBLOCK O_NONBLOCK |
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391 | # endif |
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392 | # ifndef EFD_CLOEXEC |
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393 | # ifdef O_CLOEXEC |
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394 | # define EFD_CLOEXEC O_CLOEXEC |
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395 | # else |
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396 | # define EFD_CLOEXEC 02000000 |
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397 | # endif |
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398 | # endif |
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399 | # ifdef __cplusplus |
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400 | extern "C" { |
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401 | # endif |
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402 | int (eventfd) (unsigned int initval, int flags); |
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403 | # ifdef __cplusplus |
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404 | } |
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405 | # endif |
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406 | #endif |
21 | |
407 | |
22 | struct ev_watcher { |
408 | #if EV_USE_SIGNALFD |
23 | EV_WATCHER (ev_watcher); |
409 | /* our minimum requirement is glibc 2.7 which has the stub, but not the header */ |
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410 | # include <stdint.h> |
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411 | # ifndef SFD_NONBLOCK |
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412 | # define SFD_NONBLOCK O_NONBLOCK |
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413 | # endif |
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414 | # ifndef SFD_CLOEXEC |
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415 | # ifdef O_CLOEXEC |
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416 | # define SFD_CLOEXEC O_CLOEXEC |
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417 | # else |
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418 | # define SFD_CLOEXEC 02000000 |
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419 | # endif |
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420 | # endif |
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421 | # ifdef __cplusplus |
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422 | extern "C" { |
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423 | # endif |
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424 | int signalfd (int fd, const sigset_t *mask, int flags); |
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425 | |
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426 | struct signalfd_siginfo |
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427 | { |
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428 | uint32_t ssi_signo; |
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429 | char pad[128 - sizeof (uint32_t)]; |
24 | }; |
430 | }; |
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431 | # ifdef __cplusplus |
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432 | } |
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433 | # endif |
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434 | #endif |
25 | |
435 | |
26 | struct ev_watcher_list { |
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27 | EV_WATCHER_LIST (ev_watcher_list); |
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28 | }; |
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29 | |
436 | |
|
|
437 | /**/ |
|
|
438 | |
|
|
439 | #if EV_VERIFY >= 3 |
|
|
440 | # define EV_FREQUENT_CHECK ev_verify (EV_A) |
|
|
441 | #else |
|
|
442 | # define EV_FREQUENT_CHECK do { } while (0) |
|
|
443 | #endif |
|
|
444 | |
|
|
445 | /* |
|
|
446 | * This is used to avoid floating point rounding problems. |
|
|
447 | * It is added to ev_rt_now when scheduling periodics |
|
|
448 | * to ensure progress, time-wise, even when rounding |
|
|
449 | * errors are against us. |
|
|
450 | * This value is good at least till the year 4000. |
|
|
451 | * Better solutions welcome. |
|
|
452 | */ |
|
|
453 | #define TIME_EPSILON 0.0001220703125 /* 1/8192 */ |
|
|
454 | |
|
|
455 | #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ |
|
|
456 | #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ |
|
|
457 | |
|
|
458 | #if __GNUC__ >= 4 |
|
|
459 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
|
|
460 | # define noinline __attribute__ ((noinline)) |
|
|
461 | #else |
|
|
462 | # define expect(expr,value) (expr) |
|
|
463 | # define noinline |
|
|
464 | # if __STDC_VERSION__ < 199901L && __GNUC__ < 2 |
|
|
465 | # define inline |
|
|
466 | # endif |
|
|
467 | #endif |
|
|
468 | |
|
|
469 | #define expect_false(expr) expect ((expr) != 0, 0) |
|
|
470 | #define expect_true(expr) expect ((expr) != 0, 1) |
|
|
471 | #define inline_size static inline |
|
|
472 | |
|
|
473 | #if EV_FEATURE_CODE |
|
|
474 | # define inline_speed static inline |
|
|
475 | #else |
|
|
476 | # define inline_speed static noinline |
|
|
477 | #endif |
|
|
478 | |
|
|
479 | #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) |
|
|
480 | |
|
|
481 | #if EV_MINPRI == EV_MAXPRI |
|
|
482 | # define ABSPRI(w) (((W)w), 0) |
|
|
483 | #else |
|
|
484 | # define ABSPRI(w) (((W)w)->priority - EV_MINPRI) |
|
|
485 | #endif |
|
|
486 | |
|
|
487 | #define EMPTY /* required for microsofts broken pseudo-c compiler */ |
|
|
488 | #define EMPTY2(a,b) /* used to suppress some warnings */ |
|
|
489 | |
|
|
490 | typedef ev_watcher *W; |
|
|
491 | typedef ev_watcher_list *WL; |
|
|
492 | typedef ev_watcher_time *WT; |
|
|
493 | |
|
|
494 | #define ev_active(w) ((W)(w))->active |
|
|
495 | #define ev_at(w) ((WT)(w))->at |
|
|
496 | |
|
|
497 | #if EV_USE_REALTIME |
|
|
498 | /* sig_atomic_t is used to avoid per-thread variables or locking but still */ |
|
|
499 | /* giving it a reasonably high chance of working on typical architetcures */ |
|
|
500 | static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ |
|
|
501 | #endif |
|
|
502 | |
|
|
503 | #if EV_USE_MONOTONIC |
|
|
504 | static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ |
|
|
505 | #endif |
|
|
506 | |
|
|
507 | #ifndef EV_FD_TO_WIN32_HANDLE |
|
|
508 | # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
|
|
509 | #endif |
|
|
510 | #ifndef EV_WIN32_HANDLE_TO_FD |
|
|
511 | # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
|
|
512 | #endif |
|
|
513 | #ifndef EV_WIN32_CLOSE_FD |
|
|
514 | # define EV_WIN32_CLOSE_FD(fd) close (fd) |
|
|
515 | #endif |
|
|
516 | |
|
|
517 | #ifdef _WIN32 |
|
|
518 | # include "ev_win32.c" |
|
|
519 | #endif |
|
|
520 | |
|
|
521 | /*****************************************************************************/ |
|
|
522 | |
|
|
523 | #if EV_AVOID_STDIO |
|
|
524 | static void noinline |
|
|
525 | ev_printerr (const char *msg) |
|
|
526 | { |
|
|
527 | write (STDERR_FILENO, msg, strlen (msg)); |
|
|
528 | } |
|
|
529 | #endif |
|
|
530 | |
|
|
531 | static void (*syserr_cb)(const char *msg); |
|
|
532 | |
|
|
533 | void |
|
|
534 | ev_set_syserr_cb (void (*cb)(const char *msg)) |
|
|
535 | { |
|
|
536 | syserr_cb = cb; |
|
|
537 | } |
|
|
538 | |
|
|
539 | static void noinline |
|
|
540 | ev_syserr (const char *msg) |
|
|
541 | { |
|
|
542 | if (!msg) |
|
|
543 | msg = "(libev) system error"; |
|
|
544 | |
|
|
545 | if (syserr_cb) |
|
|
546 | syserr_cb (msg); |
|
|
547 | else |
|
|
548 | { |
|
|
549 | #if EV_AVOID_STDIO |
|
|
550 | const char *err = strerror (errno); |
|
|
551 | |
|
|
552 | ev_printerr (msg); |
|
|
553 | ev_printerr (": "); |
|
|
554 | ev_printerr (err); |
|
|
555 | ev_printerr ("\n"); |
|
|
556 | #else |
|
|
557 | perror (msg); |
|
|
558 | #endif |
|
|
559 | abort (); |
|
|
560 | } |
|
|
561 | } |
|
|
562 | |
|
|
563 | static void * |
|
|
564 | ev_realloc_emul (void *ptr, long size) |
|
|
565 | { |
|
|
566 | #if __GLIBC__ |
|
|
567 | return realloc (ptr, size); |
|
|
568 | #else |
|
|
569 | /* some systems, notably openbsd and darwin, fail to properly |
|
|
570 | * implement realloc (x, 0) (as required by both ansi c-89 and |
|
|
571 | * the single unix specification, so work around them here. |
|
|
572 | */ |
|
|
573 | |
|
|
574 | if (size) |
|
|
575 | return realloc (ptr, size); |
|
|
576 | |
|
|
577 | free (ptr); |
|
|
578 | return 0; |
|
|
579 | #endif |
|
|
580 | } |
|
|
581 | |
|
|
582 | static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; |
|
|
583 | |
|
|
584 | void |
|
|
585 | ev_set_allocator (void *(*cb)(void *ptr, long size)) |
|
|
586 | { |
|
|
587 | alloc = cb; |
|
|
588 | } |
|
|
589 | |
|
|
590 | inline_speed void * |
|
|
591 | ev_realloc (void *ptr, long size) |
|
|
592 | { |
|
|
593 | ptr = alloc (ptr, size); |
|
|
594 | |
|
|
595 | if (!ptr && size) |
|
|
596 | { |
|
|
597 | #if EV_AVOID_STDIO |
|
|
598 | ev_printerr ("libev: memory allocation failed, aborting.\n"); |
|
|
599 | #else |
|
|
600 | fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); |
|
|
601 | #endif |
|
|
602 | abort (); |
|
|
603 | } |
|
|
604 | |
|
|
605 | return ptr; |
|
|
606 | } |
|
|
607 | |
|
|
608 | #define ev_malloc(size) ev_realloc (0, (size)) |
|
|
609 | #define ev_free(ptr) ev_realloc ((ptr), 0) |
|
|
610 | |
|
|
611 | /*****************************************************************************/ |
|
|
612 | |
|
|
613 | /* set in reify when reification needed */ |
|
|
614 | #define EV_ANFD_REIFY 1 |
|
|
615 | |
|
|
616 | /* file descriptor info structure */ |
|
|
617 | typedef struct |
|
|
618 | { |
|
|
619 | WL head; |
|
|
620 | unsigned char events; /* the events watched for */ |
|
|
621 | unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ |
|
|
622 | unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ |
|
|
623 | unsigned char unused; |
|
|
624 | #if EV_USE_EPOLL |
|
|
625 | unsigned int egen; /* generation counter to counter epoll bugs */ |
|
|
626 | #endif |
|
|
627 | #if EV_SELECT_IS_WINSOCKET |
|
|
628 | SOCKET handle; |
|
|
629 | #endif |
|
|
630 | } ANFD; |
|
|
631 | |
|
|
632 | /* stores the pending event set for a given watcher */ |
|
|
633 | typedef struct |
|
|
634 | { |
|
|
635 | W w; |
|
|
636 | int events; /* the pending event set for the given watcher */ |
|
|
637 | } ANPENDING; |
|
|
638 | |
|
|
639 | #if EV_USE_INOTIFY |
|
|
640 | /* hash table entry per inotify-id */ |
|
|
641 | typedef struct |
|
|
642 | { |
|
|
643 | WL head; |
|
|
644 | } ANFS; |
|
|
645 | #endif |
|
|
646 | |
|
|
647 | /* Heap Entry */ |
|
|
648 | #if EV_HEAP_CACHE_AT |
|
|
649 | /* a heap element */ |
|
|
650 | typedef struct { |
|
|
651 | ev_tstamp at; |
|
|
652 | WT w; |
|
|
653 | } ANHE; |
|
|
654 | |
|
|
655 | #define ANHE_w(he) (he).w /* access watcher, read-write */ |
|
|
656 | #define ANHE_at(he) (he).at /* access cached at, read-only */ |
|
|
657 | #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ |
|
|
658 | #else |
|
|
659 | /* a heap element */ |
|
|
660 | typedef WT ANHE; |
|
|
661 | |
|
|
662 | #define ANHE_w(he) (he) |
|
|
663 | #define ANHE_at(he) (he)->at |
|
|
664 | #define ANHE_at_cache(he) |
|
|
665 | #endif |
|
|
666 | |
|
|
667 | #if EV_MULTIPLICITY |
|
|
668 | |
|
|
669 | struct ev_loop |
|
|
670 | { |
|
|
671 | ev_tstamp ev_rt_now; |
|
|
672 | #define ev_rt_now ((loop)->ev_rt_now) |
|
|
673 | #define VAR(name,decl) decl; |
|
|
674 | #include "ev_vars.h" |
|
|
675 | #undef VAR |
|
|
676 | }; |
|
|
677 | #include "ev_wrap.h" |
|
|
678 | |
|
|
679 | static struct ev_loop default_loop_struct; |
|
|
680 | struct ev_loop *ev_default_loop_ptr; |
|
|
681 | |
|
|
682 | #else |
|
|
683 | |
30 | ev_tstamp ev_now; |
684 | ev_tstamp ev_rt_now; |
31 | int ev_method; |
685 | #define VAR(name,decl) static decl; |
|
|
686 | #include "ev_vars.h" |
|
|
687 | #undef VAR |
32 | |
688 | |
33 | static int have_monotonic; /* runtime */ |
689 | static int ev_default_loop_ptr; |
34 | |
690 | |
35 | static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ |
691 | #endif |
36 | static void (*method_reify)(void); |
|
|
37 | static void (*method_poll)(ev_tstamp timeout); |
|
|
38 | |
692 | |
|
|
693 | #if EV_FEATURE_API |
|
|
694 | # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A) |
|
|
695 | # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A) |
|
|
696 | # define EV_INVOKE_PENDING invoke_cb (EV_A) |
|
|
697 | #else |
|
|
698 | # define EV_RELEASE_CB (void)0 |
|
|
699 | # define EV_ACQUIRE_CB (void)0 |
|
|
700 | # define EV_INVOKE_PENDING ev_invoke_pending (EV_A) |
|
|
701 | #endif |
|
|
702 | |
|
|
703 | #define EVUNLOOP_RECURSE 0x80 |
|
|
704 | |
|
|
705 | /*****************************************************************************/ |
|
|
706 | |
|
|
707 | #ifndef EV_HAVE_EV_TIME |
39 | ev_tstamp |
708 | ev_tstamp |
40 | ev_time (void) |
709 | ev_time (void) |
41 | { |
710 | { |
42 | #if HAVE_REALTIME |
711 | #if EV_USE_REALTIME |
|
|
712 | if (expect_true (have_realtime)) |
|
|
713 | { |
43 | struct timespec ts; |
714 | struct timespec ts; |
44 | clock_gettime (CLOCK_REALTIME, &ts); |
715 | clock_gettime (CLOCK_REALTIME, &ts); |
45 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
716 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
46 | #else |
717 | } |
|
|
718 | #endif |
|
|
719 | |
47 | struct timeval tv; |
720 | struct timeval tv; |
48 | gettimeofday (&tv, 0); |
721 | gettimeofday (&tv, 0); |
49 | return tv.tv_sec + tv.tv_usec * 1e-6; |
722 | return tv.tv_sec + tv.tv_usec * 1e-6; |
50 | #endif |
|
|
51 | } |
723 | } |
|
|
724 | #endif |
52 | |
725 | |
53 | static ev_tstamp |
726 | inline_size ev_tstamp |
54 | get_clock (void) |
727 | get_clock (void) |
55 | { |
728 | { |
56 | #if HAVE_MONOTONIC |
729 | #if EV_USE_MONOTONIC |
57 | if (have_monotonic) |
730 | if (expect_true (have_monotonic)) |
58 | { |
731 | { |
59 | struct timespec ts; |
732 | struct timespec ts; |
60 | clock_gettime (CLOCK_MONOTONIC, &ts); |
733 | clock_gettime (CLOCK_MONOTONIC, &ts); |
61 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
734 | return ts.tv_sec + ts.tv_nsec * 1e-9; |
62 | } |
735 | } |
63 | #endif |
736 | #endif |
64 | |
737 | |
65 | return ev_time (); |
738 | return ev_time (); |
66 | } |
739 | } |
67 | |
740 | |
|
|
741 | #if EV_MULTIPLICITY |
|
|
742 | ev_tstamp |
|
|
743 | ev_now (EV_P) |
|
|
744 | { |
|
|
745 | return ev_rt_now; |
|
|
746 | } |
|
|
747 | #endif |
|
|
748 | |
|
|
749 | void |
|
|
750 | ev_sleep (ev_tstamp delay) |
|
|
751 | { |
|
|
752 | if (delay > 0.) |
|
|
753 | { |
|
|
754 | #if EV_USE_NANOSLEEP |
|
|
755 | struct timespec ts; |
|
|
756 | |
|
|
757 | ts.tv_sec = (time_t)delay; |
|
|
758 | ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); |
|
|
759 | |
|
|
760 | nanosleep (&ts, 0); |
|
|
761 | #elif defined(_WIN32) |
|
|
762 | Sleep ((unsigned long)(delay * 1e3)); |
|
|
763 | #else |
|
|
764 | struct timeval tv; |
|
|
765 | |
|
|
766 | tv.tv_sec = (time_t)delay; |
|
|
767 | tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); |
|
|
768 | |
|
|
769 | /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ |
|
|
770 | /* something not guaranteed by newer posix versions, but guaranteed */ |
|
|
771 | /* by older ones */ |
|
|
772 | select (0, 0, 0, 0, &tv); |
|
|
773 | #endif |
|
|
774 | } |
|
|
775 | } |
|
|
776 | |
|
|
777 | /*****************************************************************************/ |
|
|
778 | |
|
|
779 | #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ |
|
|
780 | |
|
|
781 | /* find a suitable new size for the given array, */ |
|
|
782 | /* hopefully by rounding to a ncie-to-malloc size */ |
|
|
783 | inline_size int |
|
|
784 | array_nextsize (int elem, int cur, int cnt) |
|
|
785 | { |
|
|
786 | int ncur = cur + 1; |
|
|
787 | |
|
|
788 | do |
|
|
789 | ncur <<= 1; |
|
|
790 | while (cnt > ncur); |
|
|
791 | |
|
|
792 | /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ |
|
|
793 | if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) |
|
|
794 | { |
|
|
795 | ncur *= elem; |
|
|
796 | ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); |
|
|
797 | ncur = ncur - sizeof (void *) * 4; |
|
|
798 | ncur /= elem; |
|
|
799 | } |
|
|
800 | |
|
|
801 | return ncur; |
|
|
802 | } |
|
|
803 | |
|
|
804 | static noinline void * |
|
|
805 | array_realloc (int elem, void *base, int *cur, int cnt) |
|
|
806 | { |
|
|
807 | *cur = array_nextsize (elem, *cur, cnt); |
|
|
808 | return ev_realloc (base, elem * *cur); |
|
|
809 | } |
|
|
810 | |
|
|
811 | #define array_init_zero(base,count) \ |
|
|
812 | memset ((void *)(base), 0, sizeof (*(base)) * (count)) |
|
|
813 | |
68 | #define array_needsize(base,cur,cnt,init) \ |
814 | #define array_needsize(type,base,cur,cnt,init) \ |
69 | if ((cnt) > cur) \ |
815 | if (expect_false ((cnt) > (cur))) \ |
70 | { \ |
816 | { \ |
71 | int newcnt = cur ? cur << 1 : 16; \ |
817 | int ocur_ = (cur); \ |
72 | fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ |
818 | (base) = (type *)array_realloc \ |
73 | base = realloc (base, sizeof (*base) * (newcnt)); \ |
819 | (sizeof (type), (base), &(cur), (cnt)); \ |
74 | init (base + cur, newcnt - cur); \ |
820 | init ((base) + (ocur_), (cur) - ocur_); \ |
75 | cur = newcnt; \ |
821 | } |
|
|
822 | |
|
|
823 | #if 0 |
|
|
824 | #define array_slim(type,stem) \ |
|
|
825 | if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ |
|
|
826 | { \ |
|
|
827 | stem ## max = array_roundsize (stem ## cnt >> 1); \ |
|
|
828 | base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ |
|
|
829 | fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ |
|
|
830 | } |
|
|
831 | #endif |
|
|
832 | |
|
|
833 | #define array_free(stem, idx) \ |
|
|
834 | ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 |
|
|
835 | |
|
|
836 | /*****************************************************************************/ |
|
|
837 | |
|
|
838 | /* dummy callback for pending events */ |
|
|
839 | static void noinline |
|
|
840 | pendingcb (EV_P_ ev_prepare *w, int revents) |
|
|
841 | { |
|
|
842 | } |
|
|
843 | |
|
|
844 | void noinline |
|
|
845 | ev_feed_event (EV_P_ void *w, int revents) |
|
|
846 | { |
|
|
847 | W w_ = (W)w; |
|
|
848 | int pri = ABSPRI (w_); |
|
|
849 | |
|
|
850 | if (expect_false (w_->pending)) |
|
|
851 | pendings [pri][w_->pending - 1].events |= revents; |
|
|
852 | else |
|
|
853 | { |
|
|
854 | w_->pending = ++pendingcnt [pri]; |
|
|
855 | array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); |
|
|
856 | pendings [pri][w_->pending - 1].w = w_; |
|
|
857 | pendings [pri][w_->pending - 1].events = revents; |
|
|
858 | } |
|
|
859 | } |
|
|
860 | |
|
|
861 | inline_speed void |
|
|
862 | feed_reverse (EV_P_ W w) |
|
|
863 | { |
|
|
864 | array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); |
|
|
865 | rfeeds [rfeedcnt++] = w; |
|
|
866 | } |
|
|
867 | |
|
|
868 | inline_size void |
|
|
869 | feed_reverse_done (EV_P_ int revents) |
|
|
870 | { |
|
|
871 | do |
|
|
872 | ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents); |
|
|
873 | while (rfeedcnt); |
|
|
874 | } |
|
|
875 | |
|
|
876 | inline_speed void |
|
|
877 | queue_events (EV_P_ W *events, int eventcnt, int type) |
|
|
878 | { |
|
|
879 | int i; |
|
|
880 | |
|
|
881 | for (i = 0; i < eventcnt; ++i) |
|
|
882 | ev_feed_event (EV_A_ events [i], type); |
|
|
883 | } |
|
|
884 | |
|
|
885 | /*****************************************************************************/ |
|
|
886 | |
|
|
887 | inline_speed void |
|
|
888 | fd_event_nocheck (EV_P_ int fd, int revents) |
|
|
889 | { |
|
|
890 | ANFD *anfd = anfds + fd; |
|
|
891 | ev_io *w; |
|
|
892 | |
|
|
893 | for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
|
|
894 | { |
|
|
895 | int ev = w->events & revents; |
|
|
896 | |
|
|
897 | if (ev) |
|
|
898 | ev_feed_event (EV_A_ (W)w, ev); |
|
|
899 | } |
|
|
900 | } |
|
|
901 | |
|
|
902 | /* do not submit kernel events for fds that have reify set */ |
|
|
903 | /* because that means they changed while we were polling for new events */ |
|
|
904 | inline_speed void |
|
|
905 | fd_event (EV_P_ int fd, int revents) |
|
|
906 | { |
|
|
907 | ANFD *anfd = anfds + fd; |
|
|
908 | |
|
|
909 | if (expect_true (!anfd->reify)) |
|
|
910 | fd_event_nocheck (EV_A_ fd, revents); |
|
|
911 | } |
|
|
912 | |
|
|
913 | void |
|
|
914 | ev_feed_fd_event (EV_P_ int fd, int revents) |
|
|
915 | { |
|
|
916 | if (fd >= 0 && fd < anfdmax) |
|
|
917 | fd_event_nocheck (EV_A_ fd, revents); |
|
|
918 | } |
|
|
919 | |
|
|
920 | /* make sure the external fd watch events are in-sync */ |
|
|
921 | /* with the kernel/libev internal state */ |
|
|
922 | inline_size void |
|
|
923 | fd_reify (EV_P) |
|
|
924 | { |
|
|
925 | int i; |
|
|
926 | |
|
|
927 | for (i = 0; i < fdchangecnt; ++i) |
|
|
928 | { |
|
|
929 | int fd = fdchanges [i]; |
|
|
930 | ANFD *anfd = anfds + fd; |
|
|
931 | ev_io *w; |
|
|
932 | |
|
|
933 | unsigned char events = 0; |
|
|
934 | |
|
|
935 | for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) |
|
|
936 | events |= (unsigned char)w->events; |
|
|
937 | |
|
|
938 | #if EV_SELECT_IS_WINSOCKET |
|
|
939 | if (events) |
|
|
940 | { |
|
|
941 | unsigned long arg; |
|
|
942 | anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); |
|
|
943 | assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); |
|
|
944 | } |
|
|
945 | #endif |
|
|
946 | |
|
|
947 | { |
|
|
948 | unsigned char o_events = anfd->events; |
|
|
949 | unsigned char o_reify = anfd->reify; |
|
|
950 | |
|
|
951 | anfd->reify = 0; |
|
|
952 | anfd->events = events; |
|
|
953 | |
|
|
954 | if (o_events != events || o_reify & EV__IOFDSET) |
|
|
955 | backend_modify (EV_A_ fd, o_events, events); |
76 | } |
956 | } |
|
|
957 | } |
77 | |
958 | |
|
|
959 | fdchangecnt = 0; |
|
|
960 | } |
|
|
961 | |
|
|
962 | /* something about the given fd changed */ |
|
|
963 | inline_size void |
|
|
964 | fd_change (EV_P_ int fd, int flags) |
|
|
965 | { |
|
|
966 | unsigned char reify = anfds [fd].reify; |
|
|
967 | anfds [fd].reify |= flags; |
|
|
968 | |
|
|
969 | if (expect_true (!reify)) |
|
|
970 | { |
|
|
971 | ++fdchangecnt; |
|
|
972 | array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); |
|
|
973 | fdchanges [fdchangecnt - 1] = fd; |
|
|
974 | } |
|
|
975 | } |
|
|
976 | |
|
|
977 | /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ |
|
|
978 | inline_speed void |
|
|
979 | fd_kill (EV_P_ int fd) |
|
|
980 | { |
|
|
981 | ev_io *w; |
|
|
982 | |
|
|
983 | while ((w = (ev_io *)anfds [fd].head)) |
|
|
984 | { |
|
|
985 | ev_io_stop (EV_A_ w); |
|
|
986 | ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); |
|
|
987 | } |
|
|
988 | } |
|
|
989 | |
|
|
990 | /* check whether the given fd is actually valid, for error recovery */ |
|
|
991 | inline_size int |
|
|
992 | fd_valid (int fd) |
|
|
993 | { |
|
|
994 | #ifdef _WIN32 |
|
|
995 | return EV_FD_TO_WIN32_HANDLE (fd) != -1; |
|
|
996 | #else |
|
|
997 | return fcntl (fd, F_GETFD) != -1; |
|
|
998 | #endif |
|
|
999 | } |
|
|
1000 | |
|
|
1001 | /* called on EBADF to verify fds */ |
|
|
1002 | static void noinline |
|
|
1003 | fd_ebadf (EV_P) |
|
|
1004 | { |
|
|
1005 | int fd; |
|
|
1006 | |
|
|
1007 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
1008 | if (anfds [fd].events) |
|
|
1009 | if (!fd_valid (fd) && errno == EBADF) |
|
|
1010 | fd_kill (EV_A_ fd); |
|
|
1011 | } |
|
|
1012 | |
|
|
1013 | /* called on ENOMEM in select/poll to kill some fds and retry */ |
|
|
1014 | static void noinline |
|
|
1015 | fd_enomem (EV_P) |
|
|
1016 | { |
|
|
1017 | int fd; |
|
|
1018 | |
|
|
1019 | for (fd = anfdmax; fd--; ) |
|
|
1020 | if (anfds [fd].events) |
|
|
1021 | { |
|
|
1022 | fd_kill (EV_A_ fd); |
|
|
1023 | break; |
|
|
1024 | } |
|
|
1025 | } |
|
|
1026 | |
|
|
1027 | /* usually called after fork if backend needs to re-arm all fds from scratch */ |
|
|
1028 | static void noinline |
|
|
1029 | fd_rearm_all (EV_P) |
|
|
1030 | { |
|
|
1031 | int fd; |
|
|
1032 | |
|
|
1033 | for (fd = 0; fd < anfdmax; ++fd) |
|
|
1034 | if (anfds [fd].events) |
|
|
1035 | { |
|
|
1036 | anfds [fd].events = 0; |
|
|
1037 | anfds [fd].emask = 0; |
|
|
1038 | fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY); |
|
|
1039 | } |
|
|
1040 | } |
|
|
1041 | |
|
|
1042 | /* used to prepare libev internal fd's */ |
|
|
1043 | /* this is not fork-safe */ |
|
|
1044 | inline_speed void |
|
|
1045 | fd_intern (int fd) |
|
|
1046 | { |
|
|
1047 | #ifdef _WIN32 |
|
|
1048 | unsigned long arg = 1; |
|
|
1049 | ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg); |
|
|
1050 | #else |
|
|
1051 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
|
1052 | fcntl (fd, F_SETFL, O_NONBLOCK); |
|
|
1053 | #endif |
|
|
1054 | } |
|
|
1055 | |
|
|
1056 | /*****************************************************************************/ |
|
|
1057 | |
|
|
1058 | /* |
|
|
1059 | * the heap functions want a real array index. array index 0 uis guaranteed to not |
|
|
1060 | * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives |
|
|
1061 | * the branching factor of the d-tree. |
|
|
1062 | */ |
|
|
1063 | |
|
|
1064 | /* |
|
|
1065 | * at the moment we allow libev the luxury of two heaps, |
|
|
1066 | * a small-code-size 2-heap one and a ~1.5kb larger 4-heap |
|
|
1067 | * which is more cache-efficient. |
|
|
1068 | * the difference is about 5% with 50000+ watchers. |
|
|
1069 | */ |
|
|
1070 | #if EV_USE_4HEAP |
|
|
1071 | |
|
|
1072 | #define DHEAP 4 |
|
|
1073 | #define HEAP0 (DHEAP - 1) /* index of first element in heap */ |
|
|
1074 | #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) |
|
|
1075 | #define UPHEAP_DONE(p,k) ((p) == (k)) |
|
|
1076 | |
|
|
1077 | /* away from the root */ |
|
|
1078 | inline_speed void |
|
|
1079 | downheap (ANHE *heap, int N, int k) |
|
|
1080 | { |
|
|
1081 | ANHE he = heap [k]; |
|
|
1082 | ANHE *E = heap + N + HEAP0; |
|
|
1083 | |
|
|
1084 | for (;;) |
|
|
1085 | { |
|
|
1086 | ev_tstamp minat; |
|
|
1087 | ANHE *minpos; |
|
|
1088 | ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1; |
|
|
1089 | |
|
|
1090 | /* find minimum child */ |
|
|
1091 | if (expect_true (pos + DHEAP - 1 < E)) |
|
|
1092 | { |
|
|
1093 | /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
|
|
1094 | if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
|
|
1095 | if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
|
|
1096 | if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
|
|
1097 | } |
|
|
1098 | else if (pos < E) |
|
|
1099 | { |
|
|
1100 | /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); |
|
|
1101 | if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); |
|
|
1102 | if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); |
|
|
1103 | if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); |
|
|
1104 | } |
|
|
1105 | else |
|
|
1106 | break; |
|
|
1107 | |
|
|
1108 | if (ANHE_at (he) <= minat) |
|
|
1109 | break; |
|
|
1110 | |
|
|
1111 | heap [k] = *minpos; |
|
|
1112 | ev_active (ANHE_w (*minpos)) = k; |
|
|
1113 | |
|
|
1114 | k = minpos - heap; |
|
|
1115 | } |
|
|
1116 | |
|
|
1117 | heap [k] = he; |
|
|
1118 | ev_active (ANHE_w (he)) = k; |
|
|
1119 | } |
|
|
1120 | |
|
|
1121 | #else /* 4HEAP */ |
|
|
1122 | |
|
|
1123 | #define HEAP0 1 |
|
|
1124 | #define HPARENT(k) ((k) >> 1) |
|
|
1125 | #define UPHEAP_DONE(p,k) (!(p)) |
|
|
1126 | |
|
|
1127 | /* away from the root */ |
|
|
1128 | inline_speed void |
|
|
1129 | downheap (ANHE *heap, int N, int k) |
|
|
1130 | { |
|
|
1131 | ANHE he = heap [k]; |
|
|
1132 | |
|
|
1133 | for (;;) |
|
|
1134 | { |
|
|
1135 | int c = k << 1; |
|
|
1136 | |
|
|
1137 | if (c >= N + HEAP0) |
|
|
1138 | break; |
|
|
1139 | |
|
|
1140 | c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) |
|
|
1141 | ? 1 : 0; |
|
|
1142 | |
|
|
1143 | if (ANHE_at (he) <= ANHE_at (heap [c])) |
|
|
1144 | break; |
|
|
1145 | |
|
|
1146 | heap [k] = heap [c]; |
|
|
1147 | ev_active (ANHE_w (heap [k])) = k; |
|
|
1148 | |
|
|
1149 | k = c; |
|
|
1150 | } |
|
|
1151 | |
|
|
1152 | heap [k] = he; |
|
|
1153 | ev_active (ANHE_w (he)) = k; |
|
|
1154 | } |
|
|
1155 | #endif |
|
|
1156 | |
|
|
1157 | /* towards the root */ |
|
|
1158 | inline_speed void |
|
|
1159 | upheap (ANHE *heap, int k) |
|
|
1160 | { |
|
|
1161 | ANHE he = heap [k]; |
|
|
1162 | |
|
|
1163 | for (;;) |
|
|
1164 | { |
|
|
1165 | int p = HPARENT (k); |
|
|
1166 | |
|
|
1167 | if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he)) |
|
|
1168 | break; |
|
|
1169 | |
|
|
1170 | heap [k] = heap [p]; |
|
|
1171 | ev_active (ANHE_w (heap [k])) = k; |
|
|
1172 | k = p; |
|
|
1173 | } |
|
|
1174 | |
|
|
1175 | heap [k] = he; |
|
|
1176 | ev_active (ANHE_w (he)) = k; |
|
|
1177 | } |
|
|
1178 | |
|
|
1179 | /* move an element suitably so it is in a correct place */ |
|
|
1180 | inline_size void |
|
|
1181 | adjustheap (ANHE *heap, int N, int k) |
|
|
1182 | { |
|
|
1183 | if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)])) |
|
|
1184 | upheap (heap, k); |
|
|
1185 | else |
|
|
1186 | downheap (heap, N, k); |
|
|
1187 | } |
|
|
1188 | |
|
|
1189 | /* rebuild the heap: this function is used only once and executed rarely */ |
|
|
1190 | inline_size void |
|
|
1191 | reheap (ANHE *heap, int N) |
|
|
1192 | { |
|
|
1193 | int i; |
|
|
1194 | |
|
|
1195 | /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ |
|
|
1196 | /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ |
|
|
1197 | for (i = 0; i < N; ++i) |
|
|
1198 | upheap (heap, i + HEAP0); |
|
|
1199 | } |
|
|
1200 | |
|
|
1201 | /*****************************************************************************/ |
|
|
1202 | |
|
|
1203 | /* associate signal watchers to a signal signal */ |
78 | typedef struct |
1204 | typedef struct |
79 | { |
1205 | { |
80 | struct ev_io *head; |
1206 | EV_ATOMIC_T pending; |
81 | unsigned char wev, rev; /* want, received event set */ |
1207 | #if EV_MULTIPLICITY |
82 | } ANFD; |
1208 | EV_P; |
|
|
1209 | #endif |
|
|
1210 | WL head; |
|
|
1211 | } ANSIG; |
83 | |
1212 | |
84 | static ANFD *anfds; |
1213 | static ANSIG signals [EV_NSIG - 1]; |
85 | static int anfdmax; |
|
|
86 | |
1214 | |
87 | static int *fdchanges; |
1215 | /*****************************************************************************/ |
88 | static int fdchangemax, fdchangecnt; |
|
|
89 | |
1216 | |
|
|
1217 | #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
|
|
1218 | |
|
|
1219 | static void noinline |
|
|
1220 | evpipe_init (EV_P) |
|
|
1221 | { |
|
|
1222 | if (!ev_is_active (&pipe_w)) |
|
|
1223 | { |
|
|
1224 | # if EV_USE_EVENTFD |
|
|
1225 | evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); |
|
|
1226 | if (evfd < 0 && errno == EINVAL) |
|
|
1227 | evfd = eventfd (0, 0); |
|
|
1228 | |
|
|
1229 | if (evfd >= 0) |
|
|
1230 | { |
|
|
1231 | evpipe [0] = -1; |
|
|
1232 | fd_intern (evfd); /* doing it twice doesn't hurt */ |
|
|
1233 | ev_io_set (&pipe_w, evfd, EV_READ); |
|
|
1234 | } |
|
|
1235 | else |
|
|
1236 | # endif |
|
|
1237 | { |
|
|
1238 | while (pipe (evpipe)) |
|
|
1239 | ev_syserr ("(libev) error creating signal/async pipe"); |
|
|
1240 | |
|
|
1241 | fd_intern (evpipe [0]); |
|
|
1242 | fd_intern (evpipe [1]); |
|
|
1243 | ev_io_set (&pipe_w, evpipe [0], EV_READ); |
|
|
1244 | } |
|
|
1245 | |
|
|
1246 | ev_io_start (EV_A_ &pipe_w); |
|
|
1247 | ev_unref (EV_A); /* watcher should not keep loop alive */ |
|
|
1248 | } |
|
|
1249 | } |
|
|
1250 | |
|
|
1251 | inline_size void |
|
|
1252 | evpipe_write (EV_P_ EV_ATOMIC_T *flag) |
|
|
1253 | { |
|
|
1254 | if (!*flag) |
|
|
1255 | { |
|
|
1256 | int old_errno = errno; /* save errno because write might clobber it */ |
|
|
1257 | char dummy; |
|
|
1258 | |
|
|
1259 | *flag = 1; |
|
|
1260 | |
|
|
1261 | #if EV_USE_EVENTFD |
|
|
1262 | if (evfd >= 0) |
|
|
1263 | { |
|
|
1264 | uint64_t counter = 1; |
|
|
1265 | write (evfd, &counter, sizeof (uint64_t)); |
|
|
1266 | } |
|
|
1267 | else |
|
|
1268 | #endif |
|
|
1269 | write (evpipe [1], &dummy, 1); |
|
|
1270 | |
|
|
1271 | errno = old_errno; |
|
|
1272 | } |
|
|
1273 | } |
|
|
1274 | |
|
|
1275 | /* called whenever the libev signal pipe */ |
|
|
1276 | /* got some events (signal, async) */ |
90 | static void |
1277 | static void |
91 | anfds_init (ANFD *base, int count) |
1278 | pipecb (EV_P_ ev_io *iow, int revents) |
92 | { |
1279 | { |
93 | while (count--) |
1280 | int i; |
94 | { |
1281 | |
95 | base->head = 0; |
1282 | #if EV_USE_EVENTFD |
96 | base->wev = base->rev = EV_NONE; |
1283 | if (evfd >= 0) |
97 | ++base; |
|
|
98 | } |
1284 | { |
99 | } |
1285 | uint64_t counter; |
|
|
1286 | read (evfd, &counter, sizeof (uint64_t)); |
|
|
1287 | } |
|
|
1288 | else |
|
|
1289 | #endif |
|
|
1290 | { |
|
|
1291 | char dummy; |
|
|
1292 | read (evpipe [0], &dummy, 1); |
|
|
1293 | } |
100 | |
1294 | |
101 | typedef struct |
1295 | if (sig_pending) |
102 | { |
1296 | { |
103 | struct ev_watcher *w; |
1297 | sig_pending = 0; |
104 | int events; |
|
|
105 | } ANPENDING; |
|
|
106 | |
1298 | |
107 | static ANPENDING *pendings; |
1299 | for (i = EV_NSIG - 1; i--; ) |
108 | static int pendingmax, pendingcnt; |
1300 | if (expect_false (signals [i].pending)) |
|
|
1301 | ev_feed_signal_event (EV_A_ i + 1); |
|
|
1302 | } |
|
|
1303 | |
|
|
1304 | #if EV_ASYNC_ENABLE |
|
|
1305 | if (async_pending) |
|
|
1306 | { |
|
|
1307 | async_pending = 0; |
|
|
1308 | |
|
|
1309 | for (i = asynccnt; i--; ) |
|
|
1310 | if (asyncs [i]->sent) |
|
|
1311 | { |
|
|
1312 | asyncs [i]->sent = 0; |
|
|
1313 | ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); |
|
|
1314 | } |
|
|
1315 | } |
|
|
1316 | #endif |
|
|
1317 | } |
|
|
1318 | |
|
|
1319 | /*****************************************************************************/ |
109 | |
1320 | |
110 | static void |
1321 | static void |
111 | event (struct ev_watcher *w, int events) |
1322 | ev_sighandler (int signum) |
112 | { |
1323 | { |
113 | w->pending = ++pendingcnt; |
1324 | #if EV_MULTIPLICITY |
114 | array_needsize (pendings, pendingmax, pendingcnt, ); |
1325 | EV_P = signals [signum - 1].loop; |
115 | pendings [pendingcnt - 1].w = w; |
1326 | #endif |
116 | pendings [pendingcnt - 1].events = events; |
|
|
117 | } |
|
|
118 | |
1327 | |
|
|
1328 | #ifdef _WIN32 |
|
|
1329 | signal (signum, ev_sighandler); |
|
|
1330 | #endif |
|
|
1331 | |
|
|
1332 | signals [signum - 1].pending = 1; |
|
|
1333 | evpipe_write (EV_A_ &sig_pending); |
|
|
1334 | } |
|
|
1335 | |
|
|
1336 | void noinline |
|
|
1337 | ev_feed_signal_event (EV_P_ int signum) |
|
|
1338 | { |
|
|
1339 | WL w; |
|
|
1340 | |
|
|
1341 | if (expect_false (signum <= 0 || signum > EV_NSIG)) |
|
|
1342 | return; |
|
|
1343 | |
|
|
1344 | --signum; |
|
|
1345 | |
|
|
1346 | #if EV_MULTIPLICITY |
|
|
1347 | /* it is permissible to try to feed a signal to the wrong loop */ |
|
|
1348 | /* or, likely more useful, feeding a signal nobody is waiting for */ |
|
|
1349 | |
|
|
1350 | if (expect_false (signals [signum].loop != EV_A)) |
|
|
1351 | return; |
|
|
1352 | #endif |
|
|
1353 | |
|
|
1354 | signals [signum].pending = 0; |
|
|
1355 | |
|
|
1356 | for (w = signals [signum].head; w; w = w->next) |
|
|
1357 | ev_feed_event (EV_A_ (W)w, EV_SIGNAL); |
|
|
1358 | } |
|
|
1359 | |
|
|
1360 | #if EV_USE_SIGNALFD |
119 | static void |
1361 | static void |
120 | fd_event (int fd, int events) |
1362 | sigfdcb (EV_P_ ev_io *iow, int revents) |
121 | { |
1363 | { |
122 | ANFD *anfd = anfds + fd; |
1364 | struct signalfd_siginfo si[2], *sip; /* these structs are big */ |
123 | struct ev_io *w; |
|
|
124 | |
1365 | |
125 | for (w = anfd->head; w; w = w->next) |
1366 | for (;;) |
126 | { |
|
|
127 | int ev = w->events & events; |
|
|
128 | |
|
|
129 | if (ev) |
|
|
130 | event ((struct ev_watcher *)w, ev); |
|
|
131 | } |
1367 | { |
132 | } |
1368 | ssize_t res = read (sigfd, si, sizeof (si)); |
133 | |
1369 | |
134 | static struct ev_timer **timers; |
1370 | /* not ISO-C, as res might be -1, but works with SuS */ |
135 | static int timermax, timercnt; |
1371 | for (sip = si; (char *)sip < (char *)si + res; ++sip) |
|
|
1372 | ev_feed_signal_event (EV_A_ sip->ssi_signo); |
136 | |
1373 | |
|
|
1374 | if (res < (ssize_t)sizeof (si)) |
|
|
1375 | break; |
|
|
1376 | } |
|
|
1377 | } |
|
|
1378 | #endif |
|
|
1379 | |
|
|
1380 | #endif |
|
|
1381 | |
|
|
1382 | /*****************************************************************************/ |
|
|
1383 | |
|
|
1384 | #if EV_CHILD_ENABLE |
|
|
1385 | static WL childs [EV_PID_HASHSIZE]; |
|
|
1386 | |
|
|
1387 | static ev_signal childev; |
|
|
1388 | |
|
|
1389 | #ifndef WIFCONTINUED |
|
|
1390 | # define WIFCONTINUED(status) 0 |
|
|
1391 | #endif |
|
|
1392 | |
|
|
1393 | /* handle a single child status event */ |
|
|
1394 | inline_speed void |
|
|
1395 | child_reap (EV_P_ int chain, int pid, int status) |
|
|
1396 | { |
|
|
1397 | ev_child *w; |
|
|
1398 | int traced = WIFSTOPPED (status) || WIFCONTINUED (status); |
|
|
1399 | |
|
|
1400 | for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
|
|
1401 | { |
|
|
1402 | if ((w->pid == pid || !w->pid) |
|
|
1403 | && (!traced || (w->flags & 1))) |
|
|
1404 | { |
|
|
1405 | ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ |
|
|
1406 | w->rpid = pid; |
|
|
1407 | w->rstatus = status; |
|
|
1408 | ev_feed_event (EV_A_ (W)w, EV_CHILD); |
|
|
1409 | } |
|
|
1410 | } |
|
|
1411 | } |
|
|
1412 | |
|
|
1413 | #ifndef WCONTINUED |
|
|
1414 | # define WCONTINUED 0 |
|
|
1415 | #endif |
|
|
1416 | |
|
|
1417 | /* called on sigchld etc., calls waitpid */ |
137 | static void |
1418 | static void |
138 | upheap (int k) |
1419 | childcb (EV_P_ ev_signal *sw, int revents) |
139 | { |
1420 | { |
140 | struct ev_timer *w = timers [k]; |
1421 | int pid, status; |
141 | |
1422 | |
142 | while (k && timers [k >> 1]->at > w->at) |
1423 | /* some systems define WCONTINUED but then fail to support it (linux 2.4) */ |
|
|
1424 | if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) |
|
|
1425 | if (!WCONTINUED |
|
|
1426 | || errno != EINVAL |
|
|
1427 | || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) |
|
|
1428 | return; |
|
|
1429 | |
|
|
1430 | /* make sure we are called again until all children have been reaped */ |
|
|
1431 | /* we need to do it this way so that the callback gets called before we continue */ |
|
|
1432 | ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); |
|
|
1433 | |
|
|
1434 | child_reap (EV_A_ pid, pid, status); |
|
|
1435 | if ((EV_PID_HASHSIZE) > 1) |
|
|
1436 | child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ |
|
|
1437 | } |
|
|
1438 | |
|
|
1439 | #endif |
|
|
1440 | |
|
|
1441 | /*****************************************************************************/ |
|
|
1442 | |
|
|
1443 | #if EV_USE_PORT |
|
|
1444 | # include "ev_port.c" |
|
|
1445 | #endif |
|
|
1446 | #if EV_USE_KQUEUE |
|
|
1447 | # include "ev_kqueue.c" |
|
|
1448 | #endif |
|
|
1449 | #if EV_USE_EPOLL |
|
|
1450 | # include "ev_epoll.c" |
|
|
1451 | #endif |
|
|
1452 | #if EV_USE_POLL |
|
|
1453 | # include "ev_poll.c" |
|
|
1454 | #endif |
|
|
1455 | #if EV_USE_SELECT |
|
|
1456 | # include "ev_select.c" |
|
|
1457 | #endif |
|
|
1458 | |
|
|
1459 | int |
|
|
1460 | ev_version_major (void) |
|
|
1461 | { |
|
|
1462 | return EV_VERSION_MAJOR; |
|
|
1463 | } |
|
|
1464 | |
|
|
1465 | int |
|
|
1466 | ev_version_minor (void) |
|
|
1467 | { |
|
|
1468 | return EV_VERSION_MINOR; |
|
|
1469 | } |
|
|
1470 | |
|
|
1471 | /* return true if we are running with elevated privileges and should ignore env variables */ |
|
|
1472 | int inline_size |
|
|
1473 | enable_secure (void) |
|
|
1474 | { |
|
|
1475 | #ifdef _WIN32 |
|
|
1476 | return 0; |
|
|
1477 | #else |
|
|
1478 | return getuid () != geteuid () |
|
|
1479 | || getgid () != getegid (); |
|
|
1480 | #endif |
|
|
1481 | } |
|
|
1482 | |
|
|
1483 | unsigned int |
|
|
1484 | ev_supported_backends (void) |
|
|
1485 | { |
|
|
1486 | unsigned int flags = 0; |
|
|
1487 | |
|
|
1488 | if (EV_USE_PORT ) flags |= EVBACKEND_PORT; |
|
|
1489 | if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; |
|
|
1490 | if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; |
|
|
1491 | if (EV_USE_POLL ) flags |= EVBACKEND_POLL; |
|
|
1492 | if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; |
|
|
1493 | |
|
|
1494 | return flags; |
|
|
1495 | } |
|
|
1496 | |
|
|
1497 | unsigned int |
|
|
1498 | ev_recommended_backends (void) |
|
|
1499 | { |
|
|
1500 | unsigned int flags = ev_supported_backends (); |
|
|
1501 | |
|
|
1502 | #ifndef __NetBSD__ |
|
|
1503 | /* kqueue is borked on everything but netbsd apparently */ |
|
|
1504 | /* it usually doesn't work correctly on anything but sockets and pipes */ |
|
|
1505 | flags &= ~EVBACKEND_KQUEUE; |
|
|
1506 | #endif |
|
|
1507 | #ifdef __APPLE__ |
|
|
1508 | /* only select works correctly on that "unix-certified" platform */ |
|
|
1509 | flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ |
|
|
1510 | flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ |
|
|
1511 | #endif |
|
|
1512 | |
|
|
1513 | return flags; |
|
|
1514 | } |
|
|
1515 | |
|
|
1516 | unsigned int |
|
|
1517 | ev_embeddable_backends (void) |
|
|
1518 | { |
|
|
1519 | int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; |
|
|
1520 | |
|
|
1521 | /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ |
|
|
1522 | /* please fix it and tell me how to detect the fix */ |
|
|
1523 | flags &= ~EVBACKEND_EPOLL; |
|
|
1524 | |
|
|
1525 | return flags; |
|
|
1526 | } |
|
|
1527 | |
|
|
1528 | unsigned int |
|
|
1529 | ev_backend (EV_P) |
|
|
1530 | { |
|
|
1531 | return backend; |
|
|
1532 | } |
|
|
1533 | |
|
|
1534 | #if EV_FEATURE_API |
|
|
1535 | unsigned int |
|
|
1536 | ev_iteration (EV_P) |
|
|
1537 | { |
|
|
1538 | return loop_count; |
|
|
1539 | } |
|
|
1540 | |
|
|
1541 | unsigned int |
|
|
1542 | ev_depth (EV_P) |
|
|
1543 | { |
|
|
1544 | return loop_depth; |
|
|
1545 | } |
|
|
1546 | |
|
|
1547 | void |
|
|
1548 | ev_set_io_collect_interval (EV_P_ ev_tstamp interval) |
|
|
1549 | { |
|
|
1550 | io_blocktime = interval; |
|
|
1551 | } |
|
|
1552 | |
|
|
1553 | void |
|
|
1554 | ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) |
|
|
1555 | { |
|
|
1556 | timeout_blocktime = interval; |
|
|
1557 | } |
|
|
1558 | |
|
|
1559 | void |
|
|
1560 | ev_set_userdata (EV_P_ void *data) |
|
|
1561 | { |
|
|
1562 | userdata = data; |
|
|
1563 | } |
|
|
1564 | |
|
|
1565 | void * |
|
|
1566 | ev_userdata (EV_P) |
|
|
1567 | { |
|
|
1568 | return userdata; |
|
|
1569 | } |
|
|
1570 | |
|
|
1571 | void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) |
|
|
1572 | { |
|
|
1573 | invoke_cb = invoke_pending_cb; |
|
|
1574 | } |
|
|
1575 | |
|
|
1576 | void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) |
|
|
1577 | { |
|
|
1578 | release_cb = release; |
|
|
1579 | acquire_cb = acquire; |
|
|
1580 | } |
|
|
1581 | #endif |
|
|
1582 | |
|
|
1583 | /* initialise a loop structure, must be zero-initialised */ |
|
|
1584 | static void noinline |
|
|
1585 | loop_init (EV_P_ unsigned int flags) |
|
|
1586 | { |
|
|
1587 | if (!backend) |
|
|
1588 | { |
|
|
1589 | #if EV_USE_REALTIME |
|
|
1590 | if (!have_realtime) |
|
|
1591 | { |
|
|
1592 | struct timespec ts; |
|
|
1593 | |
|
|
1594 | if (!clock_gettime (CLOCK_REALTIME, &ts)) |
|
|
1595 | have_realtime = 1; |
|
|
1596 | } |
|
|
1597 | #endif |
|
|
1598 | |
|
|
1599 | #if EV_USE_MONOTONIC |
|
|
1600 | if (!have_monotonic) |
|
|
1601 | { |
|
|
1602 | struct timespec ts; |
|
|
1603 | |
|
|
1604 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
|
|
1605 | have_monotonic = 1; |
|
|
1606 | } |
|
|
1607 | #endif |
|
|
1608 | |
|
|
1609 | /* pid check not overridable via env */ |
|
|
1610 | #ifndef _WIN32 |
|
|
1611 | if (flags & EVFLAG_FORKCHECK) |
|
|
1612 | curpid = getpid (); |
|
|
1613 | #endif |
|
|
1614 | |
|
|
1615 | if (!(flags & EVFLAG_NOENV) |
|
|
1616 | && !enable_secure () |
|
|
1617 | && getenv ("LIBEV_FLAGS")) |
|
|
1618 | flags = atoi (getenv ("LIBEV_FLAGS")); |
|
|
1619 | |
|
|
1620 | ev_rt_now = ev_time (); |
|
|
1621 | mn_now = get_clock (); |
|
|
1622 | now_floor = mn_now; |
|
|
1623 | rtmn_diff = ev_rt_now - mn_now; |
|
|
1624 | #if EV_FEATURE_API |
|
|
1625 | invoke_cb = ev_invoke_pending; |
|
|
1626 | #endif |
|
|
1627 | |
|
|
1628 | io_blocktime = 0.; |
|
|
1629 | timeout_blocktime = 0.; |
|
|
1630 | backend = 0; |
|
|
1631 | backend_fd = -1; |
|
|
1632 | sig_pending = 0; |
|
|
1633 | #if EV_ASYNC_ENABLE |
|
|
1634 | async_pending = 0; |
|
|
1635 | #endif |
|
|
1636 | #if EV_USE_INOTIFY |
|
|
1637 | fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; |
|
|
1638 | #endif |
|
|
1639 | #if EV_USE_SIGNALFD |
|
|
1640 | sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; |
|
|
1641 | #endif |
|
|
1642 | |
|
|
1643 | if (!(flags & 0x0000ffffU)) |
|
|
1644 | flags |= ev_recommended_backends (); |
|
|
1645 | |
|
|
1646 | #if EV_USE_PORT |
|
|
1647 | if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); |
|
|
1648 | #endif |
|
|
1649 | #if EV_USE_KQUEUE |
|
|
1650 | if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); |
|
|
1651 | #endif |
|
|
1652 | #if EV_USE_EPOLL |
|
|
1653 | if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); |
|
|
1654 | #endif |
|
|
1655 | #if EV_USE_POLL |
|
|
1656 | if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); |
|
|
1657 | #endif |
|
|
1658 | #if EV_USE_SELECT |
|
|
1659 | if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); |
|
|
1660 | #endif |
|
|
1661 | |
|
|
1662 | ev_prepare_init (&pending_w, pendingcb); |
|
|
1663 | |
|
|
1664 | #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
|
|
1665 | ev_init (&pipe_w, pipecb); |
|
|
1666 | ev_set_priority (&pipe_w, EV_MAXPRI); |
|
|
1667 | #endif |
|
|
1668 | } |
|
|
1669 | } |
|
|
1670 | |
|
|
1671 | /* free up a loop structure */ |
|
|
1672 | static void noinline |
|
|
1673 | loop_destroy (EV_P) |
|
|
1674 | { |
|
|
1675 | int i; |
|
|
1676 | |
|
|
1677 | if (ev_is_active (&pipe_w)) |
|
|
1678 | { |
|
|
1679 | /*ev_ref (EV_A);*/ |
|
|
1680 | /*ev_io_stop (EV_A_ &pipe_w);*/ |
|
|
1681 | |
|
|
1682 | #if EV_USE_EVENTFD |
|
|
1683 | if (evfd >= 0) |
|
|
1684 | close (evfd); |
|
|
1685 | #endif |
|
|
1686 | |
|
|
1687 | if (evpipe [0] >= 0) |
|
|
1688 | { |
|
|
1689 | EV_WIN32_CLOSE_FD (evpipe [0]); |
|
|
1690 | EV_WIN32_CLOSE_FD (evpipe [1]); |
|
|
1691 | } |
|
|
1692 | } |
|
|
1693 | |
|
|
1694 | #if EV_USE_SIGNALFD |
|
|
1695 | if (ev_is_active (&sigfd_w)) |
|
|
1696 | close (sigfd); |
|
|
1697 | #endif |
|
|
1698 | |
|
|
1699 | #if EV_USE_INOTIFY |
|
|
1700 | if (fs_fd >= 0) |
|
|
1701 | close (fs_fd); |
|
|
1702 | #endif |
|
|
1703 | |
|
|
1704 | if (backend_fd >= 0) |
|
|
1705 | close (backend_fd); |
|
|
1706 | |
|
|
1707 | #if EV_USE_PORT |
|
|
1708 | if (backend == EVBACKEND_PORT ) port_destroy (EV_A); |
|
|
1709 | #endif |
|
|
1710 | #if EV_USE_KQUEUE |
|
|
1711 | if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); |
|
|
1712 | #endif |
|
|
1713 | #if EV_USE_EPOLL |
|
|
1714 | if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); |
|
|
1715 | #endif |
|
|
1716 | #if EV_USE_POLL |
|
|
1717 | if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); |
|
|
1718 | #endif |
|
|
1719 | #if EV_USE_SELECT |
|
|
1720 | if (backend == EVBACKEND_SELECT) select_destroy (EV_A); |
|
|
1721 | #endif |
|
|
1722 | |
|
|
1723 | for (i = NUMPRI; i--; ) |
|
|
1724 | { |
|
|
1725 | array_free (pending, [i]); |
|
|
1726 | #if EV_IDLE_ENABLE |
|
|
1727 | array_free (idle, [i]); |
|
|
1728 | #endif |
|
|
1729 | } |
|
|
1730 | |
|
|
1731 | ev_free (anfds); anfds = 0; anfdmax = 0; |
|
|
1732 | |
|
|
1733 | /* have to use the microsoft-never-gets-it-right macro */ |
|
|
1734 | array_free (rfeed, EMPTY); |
|
|
1735 | array_free (fdchange, EMPTY); |
|
|
1736 | array_free (timer, EMPTY); |
|
|
1737 | #if EV_PERIODIC_ENABLE |
|
|
1738 | array_free (periodic, EMPTY); |
|
|
1739 | #endif |
|
|
1740 | #if EV_FORK_ENABLE |
|
|
1741 | array_free (fork, EMPTY); |
|
|
1742 | #endif |
|
|
1743 | array_free (prepare, EMPTY); |
|
|
1744 | array_free (check, EMPTY); |
|
|
1745 | #if EV_ASYNC_ENABLE |
|
|
1746 | array_free (async, EMPTY); |
|
|
1747 | #endif |
|
|
1748 | |
|
|
1749 | backend = 0; |
|
|
1750 | } |
|
|
1751 | |
|
|
1752 | #if EV_USE_INOTIFY |
|
|
1753 | inline_size void infy_fork (EV_P); |
|
|
1754 | #endif |
|
|
1755 | |
|
|
1756 | inline_size void |
|
|
1757 | loop_fork (EV_P) |
|
|
1758 | { |
|
|
1759 | #if EV_USE_PORT |
|
|
1760 | if (backend == EVBACKEND_PORT ) port_fork (EV_A); |
|
|
1761 | #endif |
|
|
1762 | #if EV_USE_KQUEUE |
|
|
1763 | if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); |
|
|
1764 | #endif |
|
|
1765 | #if EV_USE_EPOLL |
|
|
1766 | if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); |
|
|
1767 | #endif |
|
|
1768 | #if EV_USE_INOTIFY |
|
|
1769 | infy_fork (EV_A); |
|
|
1770 | #endif |
|
|
1771 | |
|
|
1772 | if (ev_is_active (&pipe_w)) |
|
|
1773 | { |
|
|
1774 | /* this "locks" the handlers against writing to the pipe */ |
|
|
1775 | /* while we modify the fd vars */ |
|
|
1776 | sig_pending = 1; |
|
|
1777 | #if EV_ASYNC_ENABLE |
|
|
1778 | async_pending = 1; |
|
|
1779 | #endif |
|
|
1780 | |
|
|
1781 | ev_ref (EV_A); |
|
|
1782 | ev_io_stop (EV_A_ &pipe_w); |
|
|
1783 | |
|
|
1784 | #if EV_USE_EVENTFD |
|
|
1785 | if (evfd >= 0) |
|
|
1786 | close (evfd); |
|
|
1787 | #endif |
|
|
1788 | |
|
|
1789 | if (evpipe [0] >= 0) |
|
|
1790 | { |
|
|
1791 | EV_WIN32_CLOSE_FD (evpipe [0]); |
|
|
1792 | EV_WIN32_CLOSE_FD (evpipe [1]); |
|
|
1793 | } |
|
|
1794 | |
|
|
1795 | #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE |
|
|
1796 | evpipe_init (EV_A); |
|
|
1797 | /* now iterate over everything, in case we missed something */ |
|
|
1798 | pipecb (EV_A_ &pipe_w, EV_READ); |
|
|
1799 | #endif |
|
|
1800 | } |
|
|
1801 | |
|
|
1802 | postfork = 0; |
|
|
1803 | } |
|
|
1804 | |
|
|
1805 | #if EV_MULTIPLICITY |
|
|
1806 | |
|
|
1807 | struct ev_loop * |
|
|
1808 | ev_loop_new (unsigned int flags) |
|
|
1809 | { |
|
|
1810 | EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); |
|
|
1811 | |
|
|
1812 | memset (EV_A, 0, sizeof (struct ev_loop)); |
|
|
1813 | loop_init (EV_A_ flags); |
|
|
1814 | |
|
|
1815 | if (ev_backend (EV_A)) |
|
|
1816 | return EV_A; |
|
|
1817 | |
|
|
1818 | return 0; |
|
|
1819 | } |
|
|
1820 | |
|
|
1821 | void |
|
|
1822 | ev_loop_destroy (EV_P) |
|
|
1823 | { |
|
|
1824 | loop_destroy (EV_A); |
|
|
1825 | ev_free (loop); |
|
|
1826 | } |
|
|
1827 | |
|
|
1828 | void |
|
|
1829 | ev_loop_fork (EV_P) |
|
|
1830 | { |
|
|
1831 | postfork = 1; /* must be in line with ev_default_fork */ |
|
|
1832 | } |
|
|
1833 | #endif /* multiplicity */ |
|
|
1834 | |
|
|
1835 | #if EV_VERIFY |
|
|
1836 | static void noinline |
|
|
1837 | verify_watcher (EV_P_ W w) |
|
|
1838 | { |
|
|
1839 | assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); |
|
|
1840 | |
|
|
1841 | if (w->pending) |
|
|
1842 | assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); |
|
|
1843 | } |
|
|
1844 | |
|
|
1845 | static void noinline |
|
|
1846 | verify_heap (EV_P_ ANHE *heap, int N) |
|
|
1847 | { |
|
|
1848 | int i; |
|
|
1849 | |
|
|
1850 | for (i = HEAP0; i < N + HEAP0; ++i) |
|
|
1851 | { |
|
|
1852 | assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); |
|
|
1853 | assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); |
|
|
1854 | assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); |
|
|
1855 | |
|
|
1856 | verify_watcher (EV_A_ (W)ANHE_w (heap [i])); |
|
|
1857 | } |
|
|
1858 | } |
|
|
1859 | |
|
|
1860 | static void noinline |
|
|
1861 | array_verify (EV_P_ W *ws, int cnt) |
|
|
1862 | { |
|
|
1863 | while (cnt--) |
|
|
1864 | { |
|
|
1865 | assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); |
|
|
1866 | verify_watcher (EV_A_ ws [cnt]); |
|
|
1867 | } |
|
|
1868 | } |
|
|
1869 | #endif |
|
|
1870 | |
|
|
1871 | #if EV_FEATURE_API |
|
|
1872 | void |
|
|
1873 | ev_verify (EV_P) |
|
|
1874 | { |
|
|
1875 | #if EV_VERIFY |
|
|
1876 | int i; |
|
|
1877 | WL w; |
|
|
1878 | |
|
|
1879 | assert (activecnt >= -1); |
|
|
1880 | |
|
|
1881 | assert (fdchangemax >= fdchangecnt); |
|
|
1882 | for (i = 0; i < fdchangecnt; ++i) |
|
|
1883 | assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); |
|
|
1884 | |
|
|
1885 | assert (anfdmax >= 0); |
|
|
1886 | for (i = 0; i < anfdmax; ++i) |
|
|
1887 | for (w = anfds [i].head; w; w = w->next) |
143 | { |
1888 | { |
144 | timers [k] = timers [k >> 1]; |
1889 | verify_watcher (EV_A_ (W)w); |
145 | timers [k]->active = k + 1; |
1890 | assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); |
146 | k >>= 1; |
1891 | assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); |
147 | } |
1892 | } |
148 | |
1893 | |
149 | timers [k] = w; |
1894 | assert (timermax >= timercnt); |
150 | timers [k]->active = k + 1; |
1895 | verify_heap (EV_A_ timers, timercnt); |
151 | |
1896 | |
152 | } |
1897 | #if EV_PERIODIC_ENABLE |
|
|
1898 | assert (periodicmax >= periodiccnt); |
|
|
1899 | verify_heap (EV_A_ periodics, periodiccnt); |
|
|
1900 | #endif |
153 | |
1901 | |
154 | static void |
1902 | for (i = NUMPRI; i--; ) |
155 | downheap (int k) |
1903 | { |
156 | { |
1904 | assert (pendingmax [i] >= pendingcnt [i]); |
157 | struct ev_timer *w = timers [k]; |
1905 | #if EV_IDLE_ENABLE |
|
|
1906 | assert (idleall >= 0); |
|
|
1907 | assert (idlemax [i] >= idlecnt [i]); |
|
|
1908 | array_verify (EV_A_ (W *)idles [i], idlecnt [i]); |
|
|
1909 | #endif |
|
|
1910 | } |
158 | |
1911 | |
159 | while (k < (timercnt >> 1)) |
1912 | #if EV_FORK_ENABLE |
|
|
1913 | assert (forkmax >= forkcnt); |
|
|
1914 | array_verify (EV_A_ (W *)forks, forkcnt); |
|
|
1915 | #endif |
|
|
1916 | |
|
|
1917 | #if EV_ASYNC_ENABLE |
|
|
1918 | assert (asyncmax >= asynccnt); |
|
|
1919 | array_verify (EV_A_ (W *)asyncs, asynccnt); |
|
|
1920 | #endif |
|
|
1921 | |
|
|
1922 | #if EV_PREPARE_ENABLE |
|
|
1923 | assert (preparemax >= preparecnt); |
|
|
1924 | array_verify (EV_A_ (W *)prepares, preparecnt); |
|
|
1925 | #endif |
|
|
1926 | |
|
|
1927 | #if EV_CHECK_ENABLE |
|
|
1928 | assert (checkmax >= checkcnt); |
|
|
1929 | array_verify (EV_A_ (W *)checks, checkcnt); |
|
|
1930 | #endif |
|
|
1931 | |
|
|
1932 | # if 0 |
|
|
1933 | #if EV_CHILD_ENABLE |
|
|
1934 | for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next) |
|
|
1935 | for (signum = EV_NSIG; signum--; ) if (signals [signum].pending) |
|
|
1936 | #endif |
|
|
1937 | # endif |
|
|
1938 | #endif |
|
|
1939 | } |
|
|
1940 | #endif |
|
|
1941 | |
|
|
1942 | #if EV_MULTIPLICITY |
|
|
1943 | struct ev_loop * |
|
|
1944 | ev_default_loop_init (unsigned int flags) |
|
|
1945 | #else |
|
|
1946 | int |
|
|
1947 | ev_default_loop (unsigned int flags) |
|
|
1948 | #endif |
|
|
1949 | { |
|
|
1950 | if (!ev_default_loop_ptr) |
|
|
1951 | { |
|
|
1952 | #if EV_MULTIPLICITY |
|
|
1953 | EV_P = ev_default_loop_ptr = &default_loop_struct; |
|
|
1954 | #else |
|
|
1955 | ev_default_loop_ptr = 1; |
|
|
1956 | #endif |
|
|
1957 | |
|
|
1958 | loop_init (EV_A_ flags); |
|
|
1959 | |
|
|
1960 | if (ev_backend (EV_A)) |
|
|
1961 | { |
|
|
1962 | #if EV_CHILD_ENABLE |
|
|
1963 | ev_signal_init (&childev, childcb, SIGCHLD); |
|
|
1964 | ev_set_priority (&childev, EV_MAXPRI); |
|
|
1965 | ev_signal_start (EV_A_ &childev); |
|
|
1966 | ev_unref (EV_A); /* child watcher should not keep loop alive */ |
|
|
1967 | #endif |
|
|
1968 | } |
|
|
1969 | else |
|
|
1970 | ev_default_loop_ptr = 0; |
|
|
1971 | } |
|
|
1972 | |
|
|
1973 | return ev_default_loop_ptr; |
|
|
1974 | } |
|
|
1975 | |
|
|
1976 | void |
|
|
1977 | ev_default_destroy (void) |
|
|
1978 | { |
|
|
1979 | #if EV_MULTIPLICITY |
|
|
1980 | EV_P = ev_default_loop_ptr; |
|
|
1981 | #endif |
|
|
1982 | |
|
|
1983 | ev_default_loop_ptr = 0; |
|
|
1984 | |
|
|
1985 | #if EV_CHILD_ENABLE |
|
|
1986 | ev_ref (EV_A); /* child watcher */ |
|
|
1987 | ev_signal_stop (EV_A_ &childev); |
|
|
1988 | #endif |
|
|
1989 | |
|
|
1990 | loop_destroy (EV_A); |
|
|
1991 | } |
|
|
1992 | |
|
|
1993 | void |
|
|
1994 | ev_default_fork (void) |
|
|
1995 | { |
|
|
1996 | #if EV_MULTIPLICITY |
|
|
1997 | EV_P = ev_default_loop_ptr; |
|
|
1998 | #endif |
|
|
1999 | |
|
|
2000 | postfork = 1; /* must be in line with ev_loop_fork */ |
|
|
2001 | } |
|
|
2002 | |
|
|
2003 | /*****************************************************************************/ |
|
|
2004 | |
|
|
2005 | void |
|
|
2006 | ev_invoke (EV_P_ void *w, int revents) |
|
|
2007 | { |
|
|
2008 | EV_CB_INVOKE ((W)w, revents); |
|
|
2009 | } |
|
|
2010 | |
|
|
2011 | unsigned int |
|
|
2012 | ev_pending_count (EV_P) |
|
|
2013 | { |
|
|
2014 | int pri; |
|
|
2015 | unsigned int count = 0; |
|
|
2016 | |
|
|
2017 | for (pri = NUMPRI; pri--; ) |
|
|
2018 | count += pendingcnt [pri]; |
|
|
2019 | |
|
|
2020 | return count; |
|
|
2021 | } |
|
|
2022 | |
|
|
2023 | void noinline |
|
|
2024 | ev_invoke_pending (EV_P) |
|
|
2025 | { |
|
|
2026 | int pri; |
|
|
2027 | |
|
|
2028 | for (pri = NUMPRI; pri--; ) |
|
|
2029 | while (pendingcnt [pri]) |
160 | { |
2030 | { |
161 | int j = k << 1; |
2031 | ANPENDING *p = pendings [pri] + --pendingcnt [pri]; |
162 | |
2032 | |
163 | if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at) |
2033 | /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/ |
|
|
2034 | /* ^ this is no longer true, as pending_w could be here */ |
|
|
2035 | |
|
|
2036 | p->w->pending = 0; |
|
|
2037 | EV_CB_INVOKE (p->w, p->events); |
|
|
2038 | EV_FREQUENT_CHECK; |
|
|
2039 | } |
|
|
2040 | } |
|
|
2041 | |
|
|
2042 | #if EV_IDLE_ENABLE |
|
|
2043 | /* make idle watchers pending. this handles the "call-idle */ |
|
|
2044 | /* only when higher priorities are idle" logic */ |
|
|
2045 | inline_size void |
|
|
2046 | idle_reify (EV_P) |
|
|
2047 | { |
|
|
2048 | if (expect_false (idleall)) |
|
|
2049 | { |
|
|
2050 | int pri; |
|
|
2051 | |
|
|
2052 | for (pri = NUMPRI; pri--; ) |
164 | ++j; |
2053 | { |
|
|
2054 | if (pendingcnt [pri]) |
|
|
2055 | break; |
165 | |
2056 | |
166 | if (w->at <= timers [j]->at) |
2057 | if (idlecnt [pri]) |
|
|
2058 | { |
|
|
2059 | queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE); |
|
|
2060 | break; |
|
|
2061 | } |
|
|
2062 | } |
|
|
2063 | } |
|
|
2064 | } |
|
|
2065 | #endif |
|
|
2066 | |
|
|
2067 | /* make timers pending */ |
|
|
2068 | inline_size void |
|
|
2069 | timers_reify (EV_P) |
|
|
2070 | { |
|
|
2071 | EV_FREQUENT_CHECK; |
|
|
2072 | |
|
|
2073 | if (timercnt && ANHE_at (timers [HEAP0]) < mn_now) |
|
|
2074 | { |
|
|
2075 | do |
|
|
2076 | { |
|
|
2077 | ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); |
|
|
2078 | |
|
|
2079 | /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/ |
|
|
2080 | |
|
|
2081 | /* first reschedule or stop timer */ |
|
|
2082 | if (w->repeat) |
|
|
2083 | { |
|
|
2084 | ev_at (w) += w->repeat; |
|
|
2085 | if (ev_at (w) < mn_now) |
|
|
2086 | ev_at (w) = mn_now; |
|
|
2087 | |
|
|
2088 | assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.)); |
|
|
2089 | |
|
|
2090 | ANHE_at_cache (timers [HEAP0]); |
|
|
2091 | downheap (timers, timercnt, HEAP0); |
|
|
2092 | } |
|
|
2093 | else |
|
|
2094 | ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ |
|
|
2095 | |
|
|
2096 | EV_FREQUENT_CHECK; |
|
|
2097 | feed_reverse (EV_A_ (W)w); |
|
|
2098 | } |
|
|
2099 | while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); |
|
|
2100 | |
|
|
2101 | feed_reverse_done (EV_A_ EV_TIMEOUT); |
|
|
2102 | } |
|
|
2103 | } |
|
|
2104 | |
|
|
2105 | #if EV_PERIODIC_ENABLE |
|
|
2106 | /* make periodics pending */ |
|
|
2107 | inline_size void |
|
|
2108 | periodics_reify (EV_P) |
|
|
2109 | { |
|
|
2110 | EV_FREQUENT_CHECK; |
|
|
2111 | |
|
|
2112 | while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) |
|
|
2113 | { |
|
|
2114 | int feed_count = 0; |
|
|
2115 | |
|
|
2116 | do |
|
|
2117 | { |
|
|
2118 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); |
|
|
2119 | |
|
|
2120 | /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ |
|
|
2121 | |
|
|
2122 | /* first reschedule or stop timer */ |
|
|
2123 | if (w->reschedule_cb) |
|
|
2124 | { |
|
|
2125 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
|
|
2126 | |
|
|
2127 | assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); |
|
|
2128 | |
|
|
2129 | ANHE_at_cache (periodics [HEAP0]); |
|
|
2130 | downheap (periodics, periodiccnt, HEAP0); |
|
|
2131 | } |
|
|
2132 | else if (w->interval) |
|
|
2133 | { |
|
|
2134 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
|
|
2135 | /* if next trigger time is not sufficiently in the future, put it there */ |
|
|
2136 | /* this might happen because of floating point inexactness */ |
|
|
2137 | if (ev_at (w) - ev_rt_now < TIME_EPSILON) |
|
|
2138 | { |
|
|
2139 | ev_at (w) += w->interval; |
|
|
2140 | |
|
|
2141 | /* if interval is unreasonably low we might still have a time in the past */ |
|
|
2142 | /* so correct this. this will make the periodic very inexact, but the user */ |
|
|
2143 | /* has effectively asked to get triggered more often than possible */ |
|
|
2144 | if (ev_at (w) < ev_rt_now) |
|
|
2145 | ev_at (w) = ev_rt_now; |
|
|
2146 | } |
|
|
2147 | |
|
|
2148 | ANHE_at_cache (periodics [HEAP0]); |
|
|
2149 | downheap (periodics, periodiccnt, HEAP0); |
|
|
2150 | } |
|
|
2151 | else |
|
|
2152 | ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ |
|
|
2153 | |
|
|
2154 | EV_FREQUENT_CHECK; |
|
|
2155 | feed_reverse (EV_A_ (W)w); |
|
|
2156 | } |
|
|
2157 | while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now); |
|
|
2158 | |
|
|
2159 | feed_reverse_done (EV_A_ EV_PERIODIC); |
|
|
2160 | } |
|
|
2161 | } |
|
|
2162 | |
|
|
2163 | /* simply recalculate all periodics */ |
|
|
2164 | /* TODO: maybe ensure that at leats one event happens when jumping forward? */ |
|
|
2165 | static void noinline |
|
|
2166 | periodics_reschedule (EV_P) |
|
|
2167 | { |
|
|
2168 | int i; |
|
|
2169 | |
|
|
2170 | /* adjust periodics after time jump */ |
|
|
2171 | for (i = HEAP0; i < periodiccnt + HEAP0; ++i) |
|
|
2172 | { |
|
|
2173 | ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); |
|
|
2174 | |
|
|
2175 | if (w->reschedule_cb) |
|
|
2176 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
|
|
2177 | else if (w->interval) |
|
|
2178 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
|
|
2179 | |
|
|
2180 | ANHE_at_cache (periodics [i]); |
|
|
2181 | } |
|
|
2182 | |
|
|
2183 | reheap (periodics, periodiccnt); |
|
|
2184 | } |
|
|
2185 | #endif |
|
|
2186 | |
|
|
2187 | /* adjust all timers by a given offset */ |
|
|
2188 | static void noinline |
|
|
2189 | timers_reschedule (EV_P_ ev_tstamp adjust) |
|
|
2190 | { |
|
|
2191 | int i; |
|
|
2192 | |
|
|
2193 | for (i = 0; i < timercnt; ++i) |
|
|
2194 | { |
|
|
2195 | ANHE *he = timers + i + HEAP0; |
|
|
2196 | ANHE_w (*he)->at += adjust; |
|
|
2197 | ANHE_at_cache (*he); |
|
|
2198 | } |
|
|
2199 | } |
|
|
2200 | |
|
|
2201 | /* fetch new monotonic and realtime times from the kernel */ |
|
|
2202 | /* also detect if there was a timejump, and act accordingly */ |
|
|
2203 | inline_speed void |
|
|
2204 | time_update (EV_P_ ev_tstamp max_block) |
|
|
2205 | { |
|
|
2206 | #if EV_USE_MONOTONIC |
|
|
2207 | if (expect_true (have_monotonic)) |
|
|
2208 | { |
|
|
2209 | int i; |
|
|
2210 | ev_tstamp odiff = rtmn_diff; |
|
|
2211 | |
|
|
2212 | mn_now = get_clock (); |
|
|
2213 | |
|
|
2214 | /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ |
|
|
2215 | /* interpolate in the meantime */ |
|
|
2216 | if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) |
|
|
2217 | { |
|
|
2218 | ev_rt_now = rtmn_diff + mn_now; |
|
|
2219 | return; |
|
|
2220 | } |
|
|
2221 | |
|
|
2222 | now_floor = mn_now; |
|
|
2223 | ev_rt_now = ev_time (); |
|
|
2224 | |
|
|
2225 | /* loop a few times, before making important decisions. |
|
|
2226 | * on the choice of "4": one iteration isn't enough, |
|
|
2227 | * in case we get preempted during the calls to |
|
|
2228 | * ev_time and get_clock. a second call is almost guaranteed |
|
|
2229 | * to succeed in that case, though. and looping a few more times |
|
|
2230 | * doesn't hurt either as we only do this on time-jumps or |
|
|
2231 | * in the unlikely event of having been preempted here. |
|
|
2232 | */ |
|
|
2233 | for (i = 4; --i; ) |
|
|
2234 | { |
|
|
2235 | rtmn_diff = ev_rt_now - mn_now; |
|
|
2236 | |
|
|
2237 | if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) |
|
|
2238 | return; /* all is well */ |
|
|
2239 | |
|
|
2240 | ev_rt_now = ev_time (); |
|
|
2241 | mn_now = get_clock (); |
|
|
2242 | now_floor = mn_now; |
|
|
2243 | } |
|
|
2244 | |
|
|
2245 | /* no timer adjustment, as the monotonic clock doesn't jump */ |
|
|
2246 | /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ |
|
|
2247 | # if EV_PERIODIC_ENABLE |
|
|
2248 | periodics_reschedule (EV_A); |
|
|
2249 | # endif |
|
|
2250 | } |
|
|
2251 | else |
|
|
2252 | #endif |
|
|
2253 | { |
|
|
2254 | ev_rt_now = ev_time (); |
|
|
2255 | |
|
|
2256 | if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) |
|
|
2257 | { |
|
|
2258 | /* adjust timers. this is easy, as the offset is the same for all of them */ |
|
|
2259 | timers_reschedule (EV_A_ ev_rt_now - mn_now); |
|
|
2260 | #if EV_PERIODIC_ENABLE |
|
|
2261 | periodics_reschedule (EV_A); |
|
|
2262 | #endif |
|
|
2263 | } |
|
|
2264 | |
|
|
2265 | mn_now = ev_rt_now; |
|
|
2266 | } |
|
|
2267 | } |
|
|
2268 | |
|
|
2269 | void |
|
|
2270 | ev_loop (EV_P_ int flags) |
|
|
2271 | { |
|
|
2272 | #if EV_FEATURE_API |
|
|
2273 | ++loop_depth; |
|
|
2274 | #endif |
|
|
2275 | |
|
|
2276 | assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); |
|
|
2277 | |
|
|
2278 | loop_done = EVUNLOOP_CANCEL; |
|
|
2279 | |
|
|
2280 | EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ |
|
|
2281 | |
|
|
2282 | do |
|
|
2283 | { |
|
|
2284 | #if EV_VERIFY >= 2 |
|
|
2285 | ev_verify (EV_A); |
|
|
2286 | #endif |
|
|
2287 | |
|
|
2288 | #ifndef _WIN32 |
|
|
2289 | if (expect_false (curpid)) /* penalise the forking check even more */ |
|
|
2290 | if (expect_false (getpid () != curpid)) |
|
|
2291 | { |
|
|
2292 | curpid = getpid (); |
|
|
2293 | postfork = 1; |
|
|
2294 | } |
|
|
2295 | #endif |
|
|
2296 | |
|
|
2297 | #if EV_FORK_ENABLE |
|
|
2298 | /* we might have forked, so queue fork handlers */ |
|
|
2299 | if (expect_false (postfork)) |
|
|
2300 | if (forkcnt) |
|
|
2301 | { |
|
|
2302 | queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); |
|
|
2303 | EV_INVOKE_PENDING; |
|
|
2304 | } |
|
|
2305 | #endif |
|
|
2306 | |
|
|
2307 | #if EV_PREPARE_ENABLE |
|
|
2308 | /* queue prepare watchers (and execute them) */ |
|
|
2309 | if (expect_false (preparecnt)) |
|
|
2310 | { |
|
|
2311 | queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); |
|
|
2312 | EV_INVOKE_PENDING; |
|
|
2313 | } |
|
|
2314 | #endif |
|
|
2315 | |
|
|
2316 | if (expect_false (loop_done)) |
167 | break; |
2317 | break; |
168 | |
2318 | |
169 | timers [k] = timers [j]; |
2319 | /* we might have forked, so reify kernel state if necessary */ |
170 | timers [k]->active = k + 1; |
2320 | if (expect_false (postfork)) |
171 | k = j; |
2321 | loop_fork (EV_A); |
|
|
2322 | |
|
|
2323 | /* update fd-related kernel structures */ |
|
|
2324 | fd_reify (EV_A); |
|
|
2325 | |
|
|
2326 | /* calculate blocking time */ |
|
|
2327 | { |
|
|
2328 | ev_tstamp waittime = 0.; |
|
|
2329 | ev_tstamp sleeptime = 0.; |
|
|
2330 | |
|
|
2331 | if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) |
|
|
2332 | { |
|
|
2333 | /* remember old timestamp for io_blocktime calculation */ |
|
|
2334 | ev_tstamp prev_mn_now = mn_now; |
|
|
2335 | |
|
|
2336 | /* update time to cancel out callback processing overhead */ |
|
|
2337 | time_update (EV_A_ 1e100); |
|
|
2338 | |
|
|
2339 | waittime = MAX_BLOCKTIME; |
|
|
2340 | |
|
|
2341 | if (timercnt) |
|
|
2342 | { |
|
|
2343 | ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; |
|
|
2344 | if (waittime > to) waittime = to; |
|
|
2345 | } |
|
|
2346 | |
|
|
2347 | #if EV_PERIODIC_ENABLE |
|
|
2348 | if (periodiccnt) |
|
|
2349 | { |
|
|
2350 | ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; |
|
|
2351 | if (waittime > to) waittime = to; |
|
|
2352 | } |
|
|
2353 | #endif |
|
|
2354 | |
|
|
2355 | /* don't let timeouts decrease the waittime below timeout_blocktime */ |
|
|
2356 | if (expect_false (waittime < timeout_blocktime)) |
|
|
2357 | waittime = timeout_blocktime; |
|
|
2358 | |
|
|
2359 | /* extra check because io_blocktime is commonly 0 */ |
|
|
2360 | if (expect_false (io_blocktime)) |
|
|
2361 | { |
|
|
2362 | sleeptime = io_blocktime - (mn_now - prev_mn_now); |
|
|
2363 | |
|
|
2364 | if (sleeptime > waittime - backend_fudge) |
|
|
2365 | sleeptime = waittime - backend_fudge; |
|
|
2366 | |
|
|
2367 | if (expect_true (sleeptime > 0.)) |
|
|
2368 | { |
|
|
2369 | ev_sleep (sleeptime); |
|
|
2370 | waittime -= sleeptime; |
|
|
2371 | } |
|
|
2372 | } |
|
|
2373 | } |
|
|
2374 | |
|
|
2375 | #if EV_FEATURE_API |
|
|
2376 | ++loop_count; |
|
|
2377 | #endif |
|
|
2378 | assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ |
|
|
2379 | backend_poll (EV_A_ waittime); |
|
|
2380 | assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ |
|
|
2381 | |
|
|
2382 | /* update ev_rt_now, do magic */ |
|
|
2383 | time_update (EV_A_ waittime + sleeptime); |
172 | } |
2384 | } |
173 | |
2385 | |
174 | timers [k] = w; |
2386 | /* queue pending timers and reschedule them */ |
175 | timers [k]->active = k + 1; |
2387 | timers_reify (EV_A); /* relative timers called last */ |
176 | } |
2388 | #if EV_PERIODIC_ENABLE |
177 | |
2389 | periodics_reify (EV_A); /* absolute timers called first */ |
178 | static struct ev_signal **signals; |
|
|
179 | static int signalmax, signalcnt; |
|
|
180 | |
|
|
181 | static void |
|
|
182 | signals_init (struct ev_signal **base, int count) |
|
|
183 | { |
|
|
184 | while (count--) |
|
|
185 | *base++ = 0; |
|
|
186 | } |
|
|
187 | |
|
|
188 | #if HAVE_EPOLL |
|
|
189 | # include "ev_epoll.c" |
|
|
190 | #endif |
2390 | #endif |
191 | #if HAVE_SELECT |
|
|
192 | # include "ev_select.c" |
|
|
193 | #endif |
|
|
194 | |
2391 | |
195 | int ev_init (int flags) |
2392 | #if EV_IDLE_ENABLE |
|
|
2393 | /* queue idle watchers unless other events are pending */ |
|
|
2394 | idle_reify (EV_A); |
|
|
2395 | #endif |
|
|
2396 | |
|
|
2397 | #if EV_CHECK_ENABLE |
|
|
2398 | /* queue check watchers, to be executed first */ |
|
|
2399 | if (expect_false (checkcnt)) |
|
|
2400 | queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); |
|
|
2401 | #endif |
|
|
2402 | |
|
|
2403 | EV_INVOKE_PENDING; |
|
|
2404 | } |
|
|
2405 | while (expect_true ( |
|
|
2406 | activecnt |
|
|
2407 | && !loop_done |
|
|
2408 | && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) |
|
|
2409 | )); |
|
|
2410 | |
|
|
2411 | if (loop_done == EVUNLOOP_ONE) |
|
|
2412 | loop_done = EVUNLOOP_CANCEL; |
|
|
2413 | |
|
|
2414 | #if EV_FEATURE_API |
|
|
2415 | --loop_depth; |
|
|
2416 | #endif |
|
|
2417 | } |
|
|
2418 | |
|
|
2419 | void |
|
|
2420 | ev_unloop (EV_P_ int how) |
196 | { |
2421 | { |
197 | #if HAVE_MONOTONIC |
2422 | loop_done = how; |
|
|
2423 | } |
|
|
2424 | |
|
|
2425 | void |
|
|
2426 | ev_ref (EV_P) |
|
|
2427 | { |
|
|
2428 | ++activecnt; |
|
|
2429 | } |
|
|
2430 | |
|
|
2431 | void |
|
|
2432 | ev_unref (EV_P) |
|
|
2433 | { |
|
|
2434 | --activecnt; |
|
|
2435 | } |
|
|
2436 | |
|
|
2437 | void |
|
|
2438 | ev_now_update (EV_P) |
|
|
2439 | { |
|
|
2440 | time_update (EV_A_ 1e100); |
|
|
2441 | } |
|
|
2442 | |
|
|
2443 | void |
|
|
2444 | ev_suspend (EV_P) |
|
|
2445 | { |
|
|
2446 | ev_now_update (EV_A); |
|
|
2447 | } |
|
|
2448 | |
|
|
2449 | void |
|
|
2450 | ev_resume (EV_P) |
|
|
2451 | { |
|
|
2452 | ev_tstamp mn_prev = mn_now; |
|
|
2453 | |
|
|
2454 | ev_now_update (EV_A); |
|
|
2455 | timers_reschedule (EV_A_ mn_now - mn_prev); |
|
|
2456 | #if EV_PERIODIC_ENABLE |
|
|
2457 | /* TODO: really do this? */ |
|
|
2458 | periodics_reschedule (EV_A); |
|
|
2459 | #endif |
|
|
2460 | } |
|
|
2461 | |
|
|
2462 | /*****************************************************************************/ |
|
|
2463 | /* singly-linked list management, used when the expected list length is short */ |
|
|
2464 | |
|
|
2465 | inline_size void |
|
|
2466 | wlist_add (WL *head, WL elem) |
|
|
2467 | { |
|
|
2468 | elem->next = *head; |
|
|
2469 | *head = elem; |
|
|
2470 | } |
|
|
2471 | |
|
|
2472 | inline_size void |
|
|
2473 | wlist_del (WL *head, WL elem) |
|
|
2474 | { |
|
|
2475 | while (*head) |
|
|
2476 | { |
|
|
2477 | if (expect_true (*head == elem)) |
|
|
2478 | { |
|
|
2479 | *head = elem->next; |
|
|
2480 | break; |
|
|
2481 | } |
|
|
2482 | |
|
|
2483 | head = &(*head)->next; |
|
|
2484 | } |
|
|
2485 | } |
|
|
2486 | |
|
|
2487 | /* internal, faster, version of ev_clear_pending */ |
|
|
2488 | inline_speed void |
|
|
2489 | clear_pending (EV_P_ W w) |
|
|
2490 | { |
|
|
2491 | if (w->pending) |
|
|
2492 | { |
|
|
2493 | pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w; |
|
|
2494 | w->pending = 0; |
|
|
2495 | } |
|
|
2496 | } |
|
|
2497 | |
|
|
2498 | int |
|
|
2499 | ev_clear_pending (EV_P_ void *w) |
|
|
2500 | { |
|
|
2501 | W w_ = (W)w; |
|
|
2502 | int pending = w_->pending; |
|
|
2503 | |
|
|
2504 | if (expect_true (pending)) |
|
|
2505 | { |
|
|
2506 | ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; |
|
|
2507 | p->w = (W)&pending_w; |
|
|
2508 | w_->pending = 0; |
|
|
2509 | return p->events; |
|
|
2510 | } |
|
|
2511 | else |
|
|
2512 | return 0; |
|
|
2513 | } |
|
|
2514 | |
|
|
2515 | inline_size void |
|
|
2516 | pri_adjust (EV_P_ W w) |
|
|
2517 | { |
|
|
2518 | int pri = ev_priority (w); |
|
|
2519 | pri = pri < EV_MINPRI ? EV_MINPRI : pri; |
|
|
2520 | pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; |
|
|
2521 | ev_set_priority (w, pri); |
|
|
2522 | } |
|
|
2523 | |
|
|
2524 | inline_speed void |
|
|
2525 | ev_start (EV_P_ W w, int active) |
|
|
2526 | { |
|
|
2527 | pri_adjust (EV_A_ w); |
|
|
2528 | w->active = active; |
|
|
2529 | ev_ref (EV_A); |
|
|
2530 | } |
|
|
2531 | |
|
|
2532 | inline_size void |
|
|
2533 | ev_stop (EV_P_ W w) |
|
|
2534 | { |
|
|
2535 | ev_unref (EV_A); |
|
|
2536 | w->active = 0; |
|
|
2537 | } |
|
|
2538 | |
|
|
2539 | /*****************************************************************************/ |
|
|
2540 | |
|
|
2541 | void noinline |
|
|
2542 | ev_io_start (EV_P_ ev_io *w) |
|
|
2543 | { |
|
|
2544 | int fd = w->fd; |
|
|
2545 | |
|
|
2546 | if (expect_false (ev_is_active (w))) |
|
|
2547 | return; |
|
|
2548 | |
|
|
2549 | assert (("libev: ev_io_start called with negative fd", fd >= 0)); |
|
|
2550 | assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); |
|
|
2551 | |
|
|
2552 | EV_FREQUENT_CHECK; |
|
|
2553 | |
|
|
2554 | ev_start (EV_A_ (W)w, 1); |
|
|
2555 | array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); |
|
|
2556 | wlist_add (&anfds[fd].head, (WL)w); |
|
|
2557 | |
|
|
2558 | fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); |
|
|
2559 | w->events &= ~EV__IOFDSET; |
|
|
2560 | |
|
|
2561 | EV_FREQUENT_CHECK; |
|
|
2562 | } |
|
|
2563 | |
|
|
2564 | void noinline |
|
|
2565 | ev_io_stop (EV_P_ ev_io *w) |
|
|
2566 | { |
|
|
2567 | clear_pending (EV_A_ (W)w); |
|
|
2568 | if (expect_false (!ev_is_active (w))) |
|
|
2569 | return; |
|
|
2570 | |
|
|
2571 | assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); |
|
|
2572 | |
|
|
2573 | EV_FREQUENT_CHECK; |
|
|
2574 | |
|
|
2575 | wlist_del (&anfds[w->fd].head, (WL)w); |
|
|
2576 | ev_stop (EV_A_ (W)w); |
|
|
2577 | |
|
|
2578 | fd_change (EV_A_ w->fd, 1); |
|
|
2579 | |
|
|
2580 | EV_FREQUENT_CHECK; |
|
|
2581 | } |
|
|
2582 | |
|
|
2583 | void noinline |
|
|
2584 | ev_timer_start (EV_P_ ev_timer *w) |
|
|
2585 | { |
|
|
2586 | if (expect_false (ev_is_active (w))) |
|
|
2587 | return; |
|
|
2588 | |
|
|
2589 | ev_at (w) += mn_now; |
|
|
2590 | |
|
|
2591 | assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); |
|
|
2592 | |
|
|
2593 | EV_FREQUENT_CHECK; |
|
|
2594 | |
|
|
2595 | ++timercnt; |
|
|
2596 | ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); |
|
|
2597 | array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); |
|
|
2598 | ANHE_w (timers [ev_active (w)]) = (WT)w; |
|
|
2599 | ANHE_at_cache (timers [ev_active (w)]); |
|
|
2600 | upheap (timers, ev_active (w)); |
|
|
2601 | |
|
|
2602 | EV_FREQUENT_CHECK; |
|
|
2603 | |
|
|
2604 | /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ |
|
|
2605 | } |
|
|
2606 | |
|
|
2607 | void noinline |
|
|
2608 | ev_timer_stop (EV_P_ ev_timer *w) |
|
|
2609 | { |
|
|
2610 | clear_pending (EV_A_ (W)w); |
|
|
2611 | if (expect_false (!ev_is_active (w))) |
|
|
2612 | return; |
|
|
2613 | |
|
|
2614 | EV_FREQUENT_CHECK; |
|
|
2615 | |
198 | { |
2616 | { |
199 | struct timespec ts; |
2617 | int active = ev_active (w); |
200 | if (!clock_gettime (CLOCK_MONOTONIC, &ts)) |
2618 | |
201 | have_monotonic = 1; |
2619 | assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); |
|
|
2620 | |
|
|
2621 | --timercnt; |
|
|
2622 | |
|
|
2623 | if (expect_true (active < timercnt + HEAP0)) |
|
|
2624 | { |
|
|
2625 | timers [active] = timers [timercnt + HEAP0]; |
|
|
2626 | adjustheap (timers, timercnt, active); |
|
|
2627 | } |
202 | } |
2628 | } |
203 | #endif |
|
|
204 | |
2629 | |
205 | ev_now = ev_time (); |
2630 | ev_at (w) -= mn_now; |
206 | |
2631 | |
207 | #if HAVE_EPOLL |
2632 | ev_stop (EV_A_ (W)w); |
208 | if (epoll_init (flags)) |
|
|
209 | return ev_method; |
|
|
210 | #endif |
|
|
211 | #if HAVE_SELECT |
|
|
212 | if (select_init (flags)) |
|
|
213 | return ev_method; |
|
|
214 | #endif |
|
|
215 | |
2633 | |
216 | ev_method = EVMETHOD_NONE; |
2634 | EV_FREQUENT_CHECK; |
217 | return ev_method; |
|
|
218 | } |
2635 | } |
219 | |
2636 | |
220 | void ev_prefork (void) |
2637 | void noinline |
|
|
2638 | ev_timer_again (EV_P_ ev_timer *w) |
221 | { |
2639 | { |
222 | } |
2640 | EV_FREQUENT_CHECK; |
223 | |
2641 | |
224 | void ev_postfork_parent (void) |
2642 | if (ev_is_active (w)) |
225 | { |
|
|
226 | } |
|
|
227 | |
|
|
228 | void ev_postfork_child (void) |
|
|
229 | { |
|
|
230 | #if HAVE_EPOLL |
|
|
231 | epoll_postfork_child (); |
|
|
232 | #endif |
|
|
233 | } |
|
|
234 | |
|
|
235 | static void |
|
|
236 | call_pending () |
|
|
237 | { |
|
|
238 | int i; |
|
|
239 | |
|
|
240 | for (i = 0; i < pendingcnt; ++i) |
|
|
241 | { |
|
|
242 | ANPENDING *p = pendings + i; |
|
|
243 | |
|
|
244 | if (p->w) |
|
|
245 | { |
|
|
246 | p->w->pending = 0; |
|
|
247 | p->w->cb (p->w, p->events); |
|
|
248 | } |
|
|
249 | } |
2643 | { |
250 | |
|
|
251 | pendingcnt = 0; |
|
|
252 | } |
|
|
253 | |
|
|
254 | static void |
|
|
255 | timer_reify (void) |
|
|
256 | { |
|
|
257 | while (timercnt && timers [0]->at <= ev_now) |
|
|
258 | { |
|
|
259 | struct ev_timer *w = timers [0]; |
|
|
260 | |
|
|
261 | /* first reschedule timer */ |
|
|
262 | if (w->repeat) |
2644 | if (w->repeat) |
263 | { |
2645 | { |
264 | if (w->is_abs) |
|
|
265 | w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; |
|
|
266 | else |
|
|
267 | w->at = ev_now + w->repeat; |
2646 | ev_at (w) = mn_now + w->repeat; |
268 | |
2647 | ANHE_at_cache (timers [ev_active (w)]); |
269 | downheap (0); |
2648 | adjustheap (timers, timercnt, ev_active (w)); |
270 | } |
2649 | } |
271 | else |
2650 | else |
272 | evtimer_stop (w); /* nonrepeating: stop timer */ |
2651 | ev_timer_stop (EV_A_ w); |
273 | |
2652 | } |
274 | event ((struct ev_watcher *)w, EV_TIMEOUT); |
2653 | else if (w->repeat) |
275 | } |
2654 | { |
276 | } |
2655 | ev_at (w) = w->repeat; |
|
|
2656 | ev_timer_start (EV_A_ w); |
|
|
2657 | } |
277 | |
2658 | |
278 | int ev_loop_done; |
2659 | EV_FREQUENT_CHECK; |
|
|
2660 | } |
279 | |
2661 | |
280 | int ev_loop (int flags) |
2662 | ev_tstamp |
|
|
2663 | ev_timer_remaining (EV_P_ ev_timer *w) |
281 | { |
2664 | { |
282 | double block; |
2665 | return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); |
283 | ev_loop_done = flags & EVLOOP_ONESHOT; |
2666 | } |
284 | |
2667 | |
285 | do |
2668 | #if EV_PERIODIC_ENABLE |
|
|
2669 | void noinline |
|
|
2670 | ev_periodic_start (EV_P_ ev_periodic *w) |
|
|
2671 | { |
|
|
2672 | if (expect_false (ev_is_active (w))) |
|
|
2673 | return; |
|
|
2674 | |
|
|
2675 | if (w->reschedule_cb) |
|
|
2676 | ev_at (w) = w->reschedule_cb (w, ev_rt_now); |
|
|
2677 | else if (w->interval) |
|
|
2678 | { |
|
|
2679 | assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); |
|
|
2680 | /* this formula differs from the one in periodic_reify because we do not always round up */ |
|
|
2681 | ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; |
|
|
2682 | } |
|
|
2683 | else |
|
|
2684 | ev_at (w) = w->offset; |
|
|
2685 | |
|
|
2686 | EV_FREQUENT_CHECK; |
|
|
2687 | |
|
|
2688 | ++periodiccnt; |
|
|
2689 | ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); |
|
|
2690 | array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); |
|
|
2691 | ANHE_w (periodics [ev_active (w)]) = (WT)w; |
|
|
2692 | ANHE_at_cache (periodics [ev_active (w)]); |
|
|
2693 | upheap (periodics, ev_active (w)); |
|
|
2694 | |
|
|
2695 | EV_FREQUENT_CHECK; |
|
|
2696 | |
|
|
2697 | /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ |
|
|
2698 | } |
|
|
2699 | |
|
|
2700 | void noinline |
|
|
2701 | ev_periodic_stop (EV_P_ ev_periodic *w) |
|
|
2702 | { |
|
|
2703 | clear_pending (EV_A_ (W)w); |
|
|
2704 | if (expect_false (!ev_is_active (w))) |
|
|
2705 | return; |
|
|
2706 | |
|
|
2707 | EV_FREQUENT_CHECK; |
|
|
2708 | |
|
|
2709 | { |
|
|
2710 | int active = ev_active (w); |
|
|
2711 | |
|
|
2712 | assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); |
|
|
2713 | |
|
|
2714 | --periodiccnt; |
|
|
2715 | |
|
|
2716 | if (expect_true (active < periodiccnt + HEAP0)) |
286 | { |
2717 | { |
287 | /* update fd-related kernel structures */ |
2718 | periodics [active] = periodics [periodiccnt + HEAP0]; |
288 | method_reify (); fdchangecnt = 0; |
2719 | adjustheap (periodics, periodiccnt, active); |
|
|
2720 | } |
|
|
2721 | } |
289 | |
2722 | |
290 | /* calculate blocking time */ |
2723 | ev_stop (EV_A_ (W)w); |
291 | ev_now = ev_time (); |
|
|
292 | |
2724 | |
293 | if (flags & EVLOOP_NONBLOCK) |
2725 | EV_FREQUENT_CHECK; |
294 | block = 0.; |
2726 | } |
295 | else if (!timercnt) |
2727 | |
296 | block = MAX_BLOCKTIME; |
2728 | void noinline |
|
|
2729 | ev_periodic_again (EV_P_ ev_periodic *w) |
|
|
2730 | { |
|
|
2731 | /* TODO: use adjustheap and recalculation */ |
|
|
2732 | ev_periodic_stop (EV_A_ w); |
|
|
2733 | ev_periodic_start (EV_A_ w); |
|
|
2734 | } |
|
|
2735 | #endif |
|
|
2736 | |
|
|
2737 | #ifndef SA_RESTART |
|
|
2738 | # define SA_RESTART 0 |
|
|
2739 | #endif |
|
|
2740 | |
|
|
2741 | #if EV_SIGNAL_ENABLE |
|
|
2742 | |
|
|
2743 | void noinline |
|
|
2744 | ev_signal_start (EV_P_ ev_signal *w) |
|
|
2745 | { |
|
|
2746 | if (expect_false (ev_is_active (w))) |
|
|
2747 | return; |
|
|
2748 | |
|
|
2749 | assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); |
|
|
2750 | |
|
|
2751 | #if EV_MULTIPLICITY |
|
|
2752 | assert (("libev: a signal must not be attached to two different loops", |
|
|
2753 | !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); |
|
|
2754 | |
|
|
2755 | signals [w->signum - 1].loop = EV_A; |
|
|
2756 | #endif |
|
|
2757 | |
|
|
2758 | EV_FREQUENT_CHECK; |
|
|
2759 | |
|
|
2760 | #if EV_USE_SIGNALFD |
|
|
2761 | if (sigfd == -2) |
|
|
2762 | { |
|
|
2763 | sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC); |
|
|
2764 | if (sigfd < 0 && errno == EINVAL) |
|
|
2765 | sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */ |
|
|
2766 | |
|
|
2767 | if (sigfd >= 0) |
|
|
2768 | { |
|
|
2769 | fd_intern (sigfd); /* doing it twice will not hurt */ |
|
|
2770 | |
|
|
2771 | sigemptyset (&sigfd_set); |
|
|
2772 | |
|
|
2773 | ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ); |
|
|
2774 | ev_set_priority (&sigfd_w, EV_MAXPRI); |
|
|
2775 | ev_io_start (EV_A_ &sigfd_w); |
|
|
2776 | ev_unref (EV_A); /* signalfd watcher should not keep loop alive */ |
|
|
2777 | } |
|
|
2778 | } |
|
|
2779 | |
|
|
2780 | if (sigfd >= 0) |
|
|
2781 | { |
|
|
2782 | /* TODO: check .head */ |
|
|
2783 | sigaddset (&sigfd_set, w->signum); |
|
|
2784 | sigprocmask (SIG_BLOCK, &sigfd_set, 0); |
|
|
2785 | |
|
|
2786 | signalfd (sigfd, &sigfd_set, 0); |
|
|
2787 | } |
|
|
2788 | #endif |
|
|
2789 | |
|
|
2790 | ev_start (EV_A_ (W)w, 1); |
|
|
2791 | wlist_add (&signals [w->signum - 1].head, (WL)w); |
|
|
2792 | |
|
|
2793 | if (!((WL)w)->next) |
|
|
2794 | # if EV_USE_SIGNALFD |
|
|
2795 | if (sigfd < 0) /*TODO*/ |
|
|
2796 | # endif |
|
|
2797 | { |
|
|
2798 | # ifdef _WIN32 |
|
|
2799 | evpipe_init (EV_A); |
|
|
2800 | |
|
|
2801 | signal (w->signum, ev_sighandler); |
|
|
2802 | # else |
|
|
2803 | struct sigaction sa; |
|
|
2804 | |
|
|
2805 | evpipe_init (EV_A); |
|
|
2806 | |
|
|
2807 | sa.sa_handler = ev_sighandler; |
|
|
2808 | sigfillset (&sa.sa_mask); |
|
|
2809 | sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ |
|
|
2810 | sigaction (w->signum, &sa, 0); |
|
|
2811 | |
|
|
2812 | sigemptyset (&sa.sa_mask); |
|
|
2813 | sigaddset (&sa.sa_mask, w->signum); |
|
|
2814 | sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); |
|
|
2815 | #endif |
|
|
2816 | } |
|
|
2817 | |
|
|
2818 | EV_FREQUENT_CHECK; |
|
|
2819 | } |
|
|
2820 | |
|
|
2821 | void noinline |
|
|
2822 | ev_signal_stop (EV_P_ ev_signal *w) |
|
|
2823 | { |
|
|
2824 | clear_pending (EV_A_ (W)w); |
|
|
2825 | if (expect_false (!ev_is_active (w))) |
|
|
2826 | return; |
|
|
2827 | |
|
|
2828 | EV_FREQUENT_CHECK; |
|
|
2829 | |
|
|
2830 | wlist_del (&signals [w->signum - 1].head, (WL)w); |
|
|
2831 | ev_stop (EV_A_ (W)w); |
|
|
2832 | |
|
|
2833 | if (!signals [w->signum - 1].head) |
|
|
2834 | { |
|
|
2835 | #if EV_MULTIPLICITY |
|
|
2836 | signals [w->signum - 1].loop = 0; /* unattach from signal */ |
|
|
2837 | #endif |
|
|
2838 | #if EV_USE_SIGNALFD |
|
|
2839 | if (sigfd >= 0) |
|
|
2840 | { |
|
|
2841 | sigset_t ss; |
|
|
2842 | |
|
|
2843 | sigemptyset (&ss); |
|
|
2844 | sigaddset (&ss, w->signum); |
|
|
2845 | sigdelset (&sigfd_set, w->signum); |
|
|
2846 | |
|
|
2847 | signalfd (sigfd, &sigfd_set, 0); |
|
|
2848 | sigprocmask (SIG_UNBLOCK, &ss, 0); |
|
|
2849 | } |
297 | else |
2850 | else |
|
|
2851 | #endif |
|
|
2852 | signal (w->signum, SIG_DFL); |
|
|
2853 | } |
|
|
2854 | |
|
|
2855 | EV_FREQUENT_CHECK; |
|
|
2856 | } |
|
|
2857 | |
|
|
2858 | #endif |
|
|
2859 | |
|
|
2860 | #if EV_CHILD_ENABLE |
|
|
2861 | |
|
|
2862 | void |
|
|
2863 | ev_child_start (EV_P_ ev_child *w) |
|
|
2864 | { |
|
|
2865 | #if EV_MULTIPLICITY |
|
|
2866 | assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); |
|
|
2867 | #endif |
|
|
2868 | if (expect_false (ev_is_active (w))) |
|
|
2869 | return; |
|
|
2870 | |
|
|
2871 | EV_FREQUENT_CHECK; |
|
|
2872 | |
|
|
2873 | ev_start (EV_A_ (W)w, 1); |
|
|
2874 | wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
|
|
2875 | |
|
|
2876 | EV_FREQUENT_CHECK; |
|
|
2877 | } |
|
|
2878 | |
|
|
2879 | void |
|
|
2880 | ev_child_stop (EV_P_ ev_child *w) |
|
|
2881 | { |
|
|
2882 | clear_pending (EV_A_ (W)w); |
|
|
2883 | if (expect_false (!ev_is_active (w))) |
|
|
2884 | return; |
|
|
2885 | |
|
|
2886 | EV_FREQUENT_CHECK; |
|
|
2887 | |
|
|
2888 | wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w); |
|
|
2889 | ev_stop (EV_A_ (W)w); |
|
|
2890 | |
|
|
2891 | EV_FREQUENT_CHECK; |
|
|
2892 | } |
|
|
2893 | |
|
|
2894 | #endif |
|
|
2895 | |
|
|
2896 | #if EV_STAT_ENABLE |
|
|
2897 | |
|
|
2898 | # ifdef _WIN32 |
|
|
2899 | # undef lstat |
|
|
2900 | # define lstat(a,b) _stati64 (a,b) |
|
|
2901 | # endif |
|
|
2902 | |
|
|
2903 | #define DEF_STAT_INTERVAL 5.0074891 |
|
|
2904 | #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ |
|
|
2905 | #define MIN_STAT_INTERVAL 0.1074891 |
|
|
2906 | |
|
|
2907 | static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); |
|
|
2908 | |
|
|
2909 | #if EV_USE_INOTIFY |
|
|
2910 | |
|
|
2911 | /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ |
|
|
2912 | # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) |
|
|
2913 | |
|
|
2914 | static void noinline |
|
|
2915 | infy_add (EV_P_ ev_stat *w) |
|
|
2916 | { |
|
|
2917 | w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); |
|
|
2918 | |
|
|
2919 | if (w->wd >= 0) |
|
|
2920 | { |
|
|
2921 | struct statfs sfs; |
|
|
2922 | |
|
|
2923 | /* now local changes will be tracked by inotify, but remote changes won't */ |
|
|
2924 | /* unless the filesystem is known to be local, we therefore still poll */ |
|
|
2925 | /* also do poll on <2.6.25, but with normal frequency */ |
|
|
2926 | |
|
|
2927 | if (!fs_2625) |
|
|
2928 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
2929 | else if (!statfs (w->path, &sfs) |
|
|
2930 | && (sfs.f_type == 0x1373 /* devfs */ |
|
|
2931 | || sfs.f_type == 0xEF53 /* ext2/3 */ |
|
|
2932 | || sfs.f_type == 0x3153464a /* jfs */ |
|
|
2933 | || sfs.f_type == 0x52654973 /* reiser3 */ |
|
|
2934 | || sfs.f_type == 0x01021994 /* tempfs */ |
|
|
2935 | || sfs.f_type == 0x58465342 /* xfs */)) |
|
|
2936 | w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ |
|
|
2937 | else |
|
|
2938 | w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ |
|
|
2939 | } |
|
|
2940 | else |
|
|
2941 | { |
|
|
2942 | /* can't use inotify, continue to stat */ |
|
|
2943 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
2944 | |
|
|
2945 | /* if path is not there, monitor some parent directory for speedup hints */ |
|
|
2946 | /* note that exceeding the hardcoded path limit is not a correctness issue, */ |
|
|
2947 | /* but an efficiency issue only */ |
|
|
2948 | if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) |
298 | { |
2949 | { |
299 | block = timers [0]->at - ev_now + method_fudge; |
2950 | char path [4096]; |
300 | if (block < 0.) block = 0.; |
2951 | strcpy (path, w->path); |
301 | else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME; |
2952 | |
|
|
2953 | do |
|
|
2954 | { |
|
|
2955 | int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF |
|
|
2956 | | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); |
|
|
2957 | |
|
|
2958 | char *pend = strrchr (path, '/'); |
|
|
2959 | |
|
|
2960 | if (!pend || pend == path) |
|
|
2961 | break; |
|
|
2962 | |
|
|
2963 | *pend = 0; |
|
|
2964 | w->wd = inotify_add_watch (fs_fd, path, mask); |
|
|
2965 | } |
|
|
2966 | while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); |
302 | } |
2967 | } |
|
|
2968 | } |
303 | |
2969 | |
304 | method_poll (block); |
2970 | if (w->wd >= 0) |
|
|
2971 | wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
305 | |
2972 | |
306 | /* put pending timers into pendign queue and reschedule them */ |
2973 | /* now re-arm timer, if required */ |
307 | timer_reify (); |
2974 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
|
|
2975 | ev_timer_again (EV_A_ &w->timer); |
|
|
2976 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
|
|
2977 | } |
308 | |
2978 | |
309 | ev_now = ev_time (); |
2979 | static void noinline |
310 | call_pending (); |
2980 | infy_del (EV_P_ ev_stat *w) |
|
|
2981 | { |
|
|
2982 | int slot; |
|
|
2983 | int wd = w->wd; |
|
|
2984 | |
|
|
2985 | if (wd < 0) |
|
|
2986 | return; |
|
|
2987 | |
|
|
2988 | w->wd = -2; |
|
|
2989 | slot = wd & ((EV_INOTIFY_HASHSIZE) - 1); |
|
|
2990 | wlist_del (&fs_hash [slot].head, (WL)w); |
|
|
2991 | |
|
|
2992 | /* remove this watcher, if others are watching it, they will rearm */ |
|
|
2993 | inotify_rm_watch (fs_fd, wd); |
|
|
2994 | } |
|
|
2995 | |
|
|
2996 | static void noinline |
|
|
2997 | infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) |
|
|
2998 | { |
|
|
2999 | if (slot < 0) |
|
|
3000 | /* overflow, need to check for all hash slots */ |
|
|
3001 | for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
|
|
3002 | infy_wd (EV_A_ slot, wd, ev); |
|
|
3003 | else |
311 | } |
3004 | { |
312 | while (!ev_loop_done); |
3005 | WL w_; |
|
|
3006 | |
|
|
3007 | for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; ) |
|
|
3008 | { |
|
|
3009 | ev_stat *w = (ev_stat *)w_; |
|
|
3010 | w_ = w_->next; /* lets us remove this watcher and all before it */ |
|
|
3011 | |
|
|
3012 | if (w->wd == wd || wd == -1) |
|
|
3013 | { |
|
|
3014 | if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) |
|
|
3015 | { |
|
|
3016 | wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w); |
|
|
3017 | w->wd = -1; |
|
|
3018 | infy_add (EV_A_ w); /* re-add, no matter what */ |
|
|
3019 | } |
|
|
3020 | |
|
|
3021 | stat_timer_cb (EV_A_ &w->timer, 0); |
|
|
3022 | } |
|
|
3023 | } |
|
|
3024 | } |
313 | } |
3025 | } |
314 | |
3026 | |
315 | static void |
3027 | static void |
316 | wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
3028 | infy_cb (EV_P_ ev_io *w, int revents) |
317 | { |
3029 | { |
318 | elem->next = *head; |
3030 | char buf [EV_INOTIFY_BUFSIZE]; |
319 | *head = elem; |
3031 | int ofs; |
|
|
3032 | int len = read (fs_fd, buf, sizeof (buf)); |
|
|
3033 | |
|
|
3034 | for (ofs = 0; ofs < len; ) |
|
|
3035 | { |
|
|
3036 | struct inotify_event *ev = (struct inotify_event *)(buf + ofs); |
|
|
3037 | infy_wd (EV_A_ ev->wd, ev->wd, ev); |
|
|
3038 | ofs += sizeof (struct inotify_event) + ev->len; |
|
|
3039 | } |
|
|
3040 | } |
|
|
3041 | |
|
|
3042 | inline_size unsigned int |
|
|
3043 | ev_linux_version (void) |
|
|
3044 | { |
|
|
3045 | struct utsname buf; |
|
|
3046 | unsigned int v; |
|
|
3047 | int i; |
|
|
3048 | char *p = buf.release; |
|
|
3049 | |
|
|
3050 | if (uname (&buf)) |
|
|
3051 | return 0; |
|
|
3052 | |
|
|
3053 | for (i = 3+1; --i; ) |
|
|
3054 | { |
|
|
3055 | unsigned int c = 0; |
|
|
3056 | |
|
|
3057 | for (;;) |
|
|
3058 | { |
|
|
3059 | if (*p >= '0' && *p <= '9') |
|
|
3060 | c = c * 10 + *p++ - '0'; |
|
|
3061 | else |
|
|
3062 | { |
|
|
3063 | p += *p == '.'; |
|
|
3064 | break; |
|
|
3065 | } |
|
|
3066 | } |
|
|
3067 | |
|
|
3068 | v = (v << 8) | c; |
|
|
3069 | } |
|
|
3070 | |
|
|
3071 | return v; |
|
|
3072 | } |
|
|
3073 | |
|
|
3074 | inline_size void |
|
|
3075 | ev_check_2625 (EV_P) |
|
|
3076 | { |
|
|
3077 | /* kernels < 2.6.25 are borked |
|
|
3078 | * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html |
|
|
3079 | */ |
|
|
3080 | if (ev_linux_version () < 0x020619) |
|
|
3081 | return; |
|
|
3082 | |
|
|
3083 | fs_2625 = 1; |
|
|
3084 | } |
|
|
3085 | |
|
|
3086 | inline_size int |
|
|
3087 | infy_newfd (void) |
|
|
3088 | { |
|
|
3089 | #if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) |
|
|
3090 | int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); |
|
|
3091 | if (fd >= 0) |
|
|
3092 | return fd; |
|
|
3093 | #endif |
|
|
3094 | return inotify_init (); |
|
|
3095 | } |
|
|
3096 | |
|
|
3097 | inline_size void |
|
|
3098 | infy_init (EV_P) |
|
|
3099 | { |
|
|
3100 | if (fs_fd != -2) |
|
|
3101 | return; |
|
|
3102 | |
|
|
3103 | fs_fd = -1; |
|
|
3104 | |
|
|
3105 | ev_check_2625 (EV_A); |
|
|
3106 | |
|
|
3107 | fs_fd = infy_newfd (); |
|
|
3108 | |
|
|
3109 | if (fs_fd >= 0) |
|
|
3110 | { |
|
|
3111 | fd_intern (fs_fd); |
|
|
3112 | ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); |
|
|
3113 | ev_set_priority (&fs_w, EV_MAXPRI); |
|
|
3114 | ev_io_start (EV_A_ &fs_w); |
|
|
3115 | ev_unref (EV_A); |
|
|
3116 | } |
|
|
3117 | } |
|
|
3118 | |
|
|
3119 | inline_size void |
|
|
3120 | infy_fork (EV_P) |
|
|
3121 | { |
|
|
3122 | int slot; |
|
|
3123 | |
|
|
3124 | if (fs_fd < 0) |
|
|
3125 | return; |
|
|
3126 | |
|
|
3127 | ev_ref (EV_A); |
|
|
3128 | ev_io_stop (EV_A_ &fs_w); |
|
|
3129 | close (fs_fd); |
|
|
3130 | fs_fd = infy_newfd (); |
|
|
3131 | |
|
|
3132 | if (fs_fd >= 0) |
|
|
3133 | { |
|
|
3134 | fd_intern (fs_fd); |
|
|
3135 | ev_io_set (&fs_w, fs_fd, EV_READ); |
|
|
3136 | ev_io_start (EV_A_ &fs_w); |
|
|
3137 | ev_unref (EV_A); |
|
|
3138 | } |
|
|
3139 | |
|
|
3140 | for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) |
|
|
3141 | { |
|
|
3142 | WL w_ = fs_hash [slot].head; |
|
|
3143 | fs_hash [slot].head = 0; |
|
|
3144 | |
|
|
3145 | while (w_) |
|
|
3146 | { |
|
|
3147 | ev_stat *w = (ev_stat *)w_; |
|
|
3148 | w_ = w_->next; /* lets us add this watcher */ |
|
|
3149 | |
|
|
3150 | w->wd = -1; |
|
|
3151 | |
|
|
3152 | if (fs_fd >= 0) |
|
|
3153 | infy_add (EV_A_ w); /* re-add, no matter what */ |
|
|
3154 | else |
|
|
3155 | { |
|
|
3156 | w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; |
|
|
3157 | if (ev_is_active (&w->timer)) ev_ref (EV_A); |
|
|
3158 | ev_timer_again (EV_A_ &w->timer); |
|
|
3159 | if (ev_is_active (&w->timer)) ev_unref (EV_A); |
|
|
3160 | } |
|
|
3161 | } |
|
|
3162 | } |
|
|
3163 | } |
|
|
3164 | |
|
|
3165 | #endif |
|
|
3166 | |
|
|
3167 | #ifdef _WIN32 |
|
|
3168 | # define EV_LSTAT(p,b) _stati64 (p, b) |
|
|
3169 | #else |
|
|
3170 | # define EV_LSTAT(p,b) lstat (p, b) |
|
|
3171 | #endif |
|
|
3172 | |
|
|
3173 | void |
|
|
3174 | ev_stat_stat (EV_P_ ev_stat *w) |
|
|
3175 | { |
|
|
3176 | if (lstat (w->path, &w->attr) < 0) |
|
|
3177 | w->attr.st_nlink = 0; |
|
|
3178 | else if (!w->attr.st_nlink) |
|
|
3179 | w->attr.st_nlink = 1; |
|
|
3180 | } |
|
|
3181 | |
|
|
3182 | static void noinline |
|
|
3183 | stat_timer_cb (EV_P_ ev_timer *w_, int revents) |
|
|
3184 | { |
|
|
3185 | ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); |
|
|
3186 | |
|
|
3187 | ev_statdata prev = w->attr; |
|
|
3188 | ev_stat_stat (EV_A_ w); |
|
|
3189 | |
|
|
3190 | /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ |
|
|
3191 | if ( |
|
|
3192 | prev.st_dev != w->attr.st_dev |
|
|
3193 | || prev.st_ino != w->attr.st_ino |
|
|
3194 | || prev.st_mode != w->attr.st_mode |
|
|
3195 | || prev.st_nlink != w->attr.st_nlink |
|
|
3196 | || prev.st_uid != w->attr.st_uid |
|
|
3197 | || prev.st_gid != w->attr.st_gid |
|
|
3198 | || prev.st_rdev != w->attr.st_rdev |
|
|
3199 | || prev.st_size != w->attr.st_size |
|
|
3200 | || prev.st_atime != w->attr.st_atime |
|
|
3201 | || prev.st_mtime != w->attr.st_mtime |
|
|
3202 | || prev.st_ctime != w->attr.st_ctime |
|
|
3203 | ) { |
|
|
3204 | /* we only update w->prev on actual differences */ |
|
|
3205 | /* in case we test more often than invoke the callback, */ |
|
|
3206 | /* to ensure that prev is always different to attr */ |
|
|
3207 | w->prev = prev; |
|
|
3208 | |
|
|
3209 | #if EV_USE_INOTIFY |
|
|
3210 | if (fs_fd >= 0) |
|
|
3211 | { |
|
|
3212 | infy_del (EV_A_ w); |
|
|
3213 | infy_add (EV_A_ w); |
|
|
3214 | ev_stat_stat (EV_A_ w); /* avoid race... */ |
|
|
3215 | } |
|
|
3216 | #endif |
|
|
3217 | |
|
|
3218 | ev_feed_event (EV_A_ w, EV_STAT); |
|
|
3219 | } |
|
|
3220 | } |
|
|
3221 | |
|
|
3222 | void |
|
|
3223 | ev_stat_start (EV_P_ ev_stat *w) |
|
|
3224 | { |
|
|
3225 | if (expect_false (ev_is_active (w))) |
|
|
3226 | return; |
|
|
3227 | |
|
|
3228 | ev_stat_stat (EV_A_ w); |
|
|
3229 | |
|
|
3230 | if (w->interval < MIN_STAT_INTERVAL && w->interval) |
|
|
3231 | w->interval = MIN_STAT_INTERVAL; |
|
|
3232 | |
|
|
3233 | ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL); |
|
|
3234 | ev_set_priority (&w->timer, ev_priority (w)); |
|
|
3235 | |
|
|
3236 | #if EV_USE_INOTIFY |
|
|
3237 | infy_init (EV_A); |
|
|
3238 | |
|
|
3239 | if (fs_fd >= 0) |
|
|
3240 | infy_add (EV_A_ w); |
|
|
3241 | else |
|
|
3242 | #endif |
|
|
3243 | { |
|
|
3244 | ev_timer_again (EV_A_ &w->timer); |
|
|
3245 | ev_unref (EV_A); |
|
|
3246 | } |
|
|
3247 | |
|
|
3248 | ev_start (EV_A_ (W)w, 1); |
|
|
3249 | |
|
|
3250 | EV_FREQUENT_CHECK; |
|
|
3251 | } |
|
|
3252 | |
|
|
3253 | void |
|
|
3254 | ev_stat_stop (EV_P_ ev_stat *w) |
|
|
3255 | { |
|
|
3256 | clear_pending (EV_A_ (W)w); |
|
|
3257 | if (expect_false (!ev_is_active (w))) |
|
|
3258 | return; |
|
|
3259 | |
|
|
3260 | EV_FREQUENT_CHECK; |
|
|
3261 | |
|
|
3262 | #if EV_USE_INOTIFY |
|
|
3263 | infy_del (EV_A_ w); |
|
|
3264 | #endif |
|
|
3265 | |
|
|
3266 | if (ev_is_active (&w->timer)) |
|
|
3267 | { |
|
|
3268 | ev_ref (EV_A); |
|
|
3269 | ev_timer_stop (EV_A_ &w->timer); |
|
|
3270 | } |
|
|
3271 | |
|
|
3272 | ev_stop (EV_A_ (W)w); |
|
|
3273 | |
|
|
3274 | EV_FREQUENT_CHECK; |
|
|
3275 | } |
|
|
3276 | #endif |
|
|
3277 | |
|
|
3278 | #if EV_IDLE_ENABLE |
|
|
3279 | void |
|
|
3280 | ev_idle_start (EV_P_ ev_idle *w) |
|
|
3281 | { |
|
|
3282 | if (expect_false (ev_is_active (w))) |
|
|
3283 | return; |
|
|
3284 | |
|
|
3285 | pri_adjust (EV_A_ (W)w); |
|
|
3286 | |
|
|
3287 | EV_FREQUENT_CHECK; |
|
|
3288 | |
|
|
3289 | { |
|
|
3290 | int active = ++idlecnt [ABSPRI (w)]; |
|
|
3291 | |
|
|
3292 | ++idleall; |
|
|
3293 | ev_start (EV_A_ (W)w, active); |
|
|
3294 | |
|
|
3295 | array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); |
|
|
3296 | idles [ABSPRI (w)][active - 1] = w; |
|
|
3297 | } |
|
|
3298 | |
|
|
3299 | EV_FREQUENT_CHECK; |
|
|
3300 | } |
|
|
3301 | |
|
|
3302 | void |
|
|
3303 | ev_idle_stop (EV_P_ ev_idle *w) |
|
|
3304 | { |
|
|
3305 | clear_pending (EV_A_ (W)w); |
|
|
3306 | if (expect_false (!ev_is_active (w))) |
|
|
3307 | return; |
|
|
3308 | |
|
|
3309 | EV_FREQUENT_CHECK; |
|
|
3310 | |
|
|
3311 | { |
|
|
3312 | int active = ev_active (w); |
|
|
3313 | |
|
|
3314 | idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; |
|
|
3315 | ev_active (idles [ABSPRI (w)][active - 1]) = active; |
|
|
3316 | |
|
|
3317 | ev_stop (EV_A_ (W)w); |
|
|
3318 | --idleall; |
|
|
3319 | } |
|
|
3320 | |
|
|
3321 | EV_FREQUENT_CHECK; |
|
|
3322 | } |
|
|
3323 | #endif |
|
|
3324 | |
|
|
3325 | #if EV_PREPARE_ENABLE |
|
|
3326 | void |
|
|
3327 | ev_prepare_start (EV_P_ ev_prepare *w) |
|
|
3328 | { |
|
|
3329 | if (expect_false (ev_is_active (w))) |
|
|
3330 | return; |
|
|
3331 | |
|
|
3332 | EV_FREQUENT_CHECK; |
|
|
3333 | |
|
|
3334 | ev_start (EV_A_ (W)w, ++preparecnt); |
|
|
3335 | array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); |
|
|
3336 | prepares [preparecnt - 1] = w; |
|
|
3337 | |
|
|
3338 | EV_FREQUENT_CHECK; |
|
|
3339 | } |
|
|
3340 | |
|
|
3341 | void |
|
|
3342 | ev_prepare_stop (EV_P_ ev_prepare *w) |
|
|
3343 | { |
|
|
3344 | clear_pending (EV_A_ (W)w); |
|
|
3345 | if (expect_false (!ev_is_active (w))) |
|
|
3346 | return; |
|
|
3347 | |
|
|
3348 | EV_FREQUENT_CHECK; |
|
|
3349 | |
|
|
3350 | { |
|
|
3351 | int active = ev_active (w); |
|
|
3352 | |
|
|
3353 | prepares [active - 1] = prepares [--preparecnt]; |
|
|
3354 | ev_active (prepares [active - 1]) = active; |
|
|
3355 | } |
|
|
3356 | |
|
|
3357 | ev_stop (EV_A_ (W)w); |
|
|
3358 | |
|
|
3359 | EV_FREQUENT_CHECK; |
|
|
3360 | } |
|
|
3361 | #endif |
|
|
3362 | |
|
|
3363 | #if EV_CHECK_ENABLE |
|
|
3364 | void |
|
|
3365 | ev_check_start (EV_P_ ev_check *w) |
|
|
3366 | { |
|
|
3367 | if (expect_false (ev_is_active (w))) |
|
|
3368 | return; |
|
|
3369 | |
|
|
3370 | EV_FREQUENT_CHECK; |
|
|
3371 | |
|
|
3372 | ev_start (EV_A_ (W)w, ++checkcnt); |
|
|
3373 | array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); |
|
|
3374 | checks [checkcnt - 1] = w; |
|
|
3375 | |
|
|
3376 | EV_FREQUENT_CHECK; |
|
|
3377 | } |
|
|
3378 | |
|
|
3379 | void |
|
|
3380 | ev_check_stop (EV_P_ ev_check *w) |
|
|
3381 | { |
|
|
3382 | clear_pending (EV_A_ (W)w); |
|
|
3383 | if (expect_false (!ev_is_active (w))) |
|
|
3384 | return; |
|
|
3385 | |
|
|
3386 | EV_FREQUENT_CHECK; |
|
|
3387 | |
|
|
3388 | { |
|
|
3389 | int active = ev_active (w); |
|
|
3390 | |
|
|
3391 | checks [active - 1] = checks [--checkcnt]; |
|
|
3392 | ev_active (checks [active - 1]) = active; |
|
|
3393 | } |
|
|
3394 | |
|
|
3395 | ev_stop (EV_A_ (W)w); |
|
|
3396 | |
|
|
3397 | EV_FREQUENT_CHECK; |
|
|
3398 | } |
|
|
3399 | #endif |
|
|
3400 | |
|
|
3401 | #if EV_EMBED_ENABLE |
|
|
3402 | void noinline |
|
|
3403 | ev_embed_sweep (EV_P_ ev_embed *w) |
|
|
3404 | { |
|
|
3405 | ev_loop (w->other, EVLOOP_NONBLOCK); |
320 | } |
3406 | } |
321 | |
3407 | |
322 | static void |
3408 | static void |
323 | wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) |
3409 | embed_io_cb (EV_P_ ev_io *io, int revents) |
324 | { |
3410 | { |
325 | while (*head) |
3411 | ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); |
|
|
3412 | |
|
|
3413 | if (ev_cb (w)) |
|
|
3414 | ev_feed_event (EV_A_ (W)w, EV_EMBED); |
|
|
3415 | else |
|
|
3416 | ev_loop (w->other, EVLOOP_NONBLOCK); |
|
|
3417 | } |
|
|
3418 | |
|
|
3419 | static void |
|
|
3420 | embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) |
|
|
3421 | { |
|
|
3422 | ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); |
|
|
3423 | |
|
|
3424 | { |
|
|
3425 | EV_P = w->other; |
|
|
3426 | |
|
|
3427 | while (fdchangecnt) |
326 | { |
3428 | { |
327 | if (*head == elem) |
3429 | fd_reify (EV_A); |
|
|
3430 | ev_loop (EV_A_ EVLOOP_NONBLOCK); |
|
|
3431 | } |
|
|
3432 | } |
|
|
3433 | } |
|
|
3434 | |
|
|
3435 | static void |
|
|
3436 | embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) |
|
|
3437 | { |
|
|
3438 | ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); |
|
|
3439 | |
|
|
3440 | ev_embed_stop (EV_A_ w); |
|
|
3441 | |
|
|
3442 | { |
|
|
3443 | EV_P = w->other; |
|
|
3444 | |
|
|
3445 | ev_loop_fork (EV_A); |
|
|
3446 | ev_loop (EV_A_ EVLOOP_NONBLOCK); |
|
|
3447 | } |
|
|
3448 | |
|
|
3449 | ev_embed_start (EV_A_ w); |
|
|
3450 | } |
|
|
3451 | |
|
|
3452 | #if 0 |
|
|
3453 | static void |
|
|
3454 | embed_idle_cb (EV_P_ ev_idle *idle, int revents) |
|
|
3455 | { |
|
|
3456 | ev_idle_stop (EV_A_ idle); |
|
|
3457 | } |
|
|
3458 | #endif |
|
|
3459 | |
|
|
3460 | void |
|
|
3461 | ev_embed_start (EV_P_ ev_embed *w) |
|
|
3462 | { |
|
|
3463 | if (expect_false (ev_is_active (w))) |
|
|
3464 | return; |
|
|
3465 | |
|
|
3466 | { |
|
|
3467 | EV_P = w->other; |
|
|
3468 | assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); |
|
|
3469 | ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); |
|
|
3470 | } |
|
|
3471 | |
|
|
3472 | EV_FREQUENT_CHECK; |
|
|
3473 | |
|
|
3474 | ev_set_priority (&w->io, ev_priority (w)); |
|
|
3475 | ev_io_start (EV_A_ &w->io); |
|
|
3476 | |
|
|
3477 | ev_prepare_init (&w->prepare, embed_prepare_cb); |
|
|
3478 | ev_set_priority (&w->prepare, EV_MINPRI); |
|
|
3479 | ev_prepare_start (EV_A_ &w->prepare); |
|
|
3480 | |
|
|
3481 | ev_fork_init (&w->fork, embed_fork_cb); |
|
|
3482 | ev_fork_start (EV_A_ &w->fork); |
|
|
3483 | |
|
|
3484 | /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ |
|
|
3485 | |
|
|
3486 | ev_start (EV_A_ (W)w, 1); |
|
|
3487 | |
|
|
3488 | EV_FREQUENT_CHECK; |
|
|
3489 | } |
|
|
3490 | |
|
|
3491 | void |
|
|
3492 | ev_embed_stop (EV_P_ ev_embed *w) |
|
|
3493 | { |
|
|
3494 | clear_pending (EV_A_ (W)w); |
|
|
3495 | if (expect_false (!ev_is_active (w))) |
|
|
3496 | return; |
|
|
3497 | |
|
|
3498 | EV_FREQUENT_CHECK; |
|
|
3499 | |
|
|
3500 | ev_io_stop (EV_A_ &w->io); |
|
|
3501 | ev_prepare_stop (EV_A_ &w->prepare); |
|
|
3502 | ev_fork_stop (EV_A_ &w->fork); |
|
|
3503 | |
|
|
3504 | ev_stop (EV_A_ (W)w); |
|
|
3505 | |
|
|
3506 | EV_FREQUENT_CHECK; |
|
|
3507 | } |
|
|
3508 | #endif |
|
|
3509 | |
|
|
3510 | #if EV_FORK_ENABLE |
|
|
3511 | void |
|
|
3512 | ev_fork_start (EV_P_ ev_fork *w) |
|
|
3513 | { |
|
|
3514 | if (expect_false (ev_is_active (w))) |
|
|
3515 | return; |
|
|
3516 | |
|
|
3517 | EV_FREQUENT_CHECK; |
|
|
3518 | |
|
|
3519 | ev_start (EV_A_ (W)w, ++forkcnt); |
|
|
3520 | array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); |
|
|
3521 | forks [forkcnt - 1] = w; |
|
|
3522 | |
|
|
3523 | EV_FREQUENT_CHECK; |
|
|
3524 | } |
|
|
3525 | |
|
|
3526 | void |
|
|
3527 | ev_fork_stop (EV_P_ ev_fork *w) |
|
|
3528 | { |
|
|
3529 | clear_pending (EV_A_ (W)w); |
|
|
3530 | if (expect_false (!ev_is_active (w))) |
|
|
3531 | return; |
|
|
3532 | |
|
|
3533 | EV_FREQUENT_CHECK; |
|
|
3534 | |
|
|
3535 | { |
|
|
3536 | int active = ev_active (w); |
|
|
3537 | |
|
|
3538 | forks [active - 1] = forks [--forkcnt]; |
|
|
3539 | ev_active (forks [active - 1]) = active; |
|
|
3540 | } |
|
|
3541 | |
|
|
3542 | ev_stop (EV_A_ (W)w); |
|
|
3543 | |
|
|
3544 | EV_FREQUENT_CHECK; |
|
|
3545 | } |
|
|
3546 | #endif |
|
|
3547 | |
|
|
3548 | #if EV_ASYNC_ENABLE |
|
|
3549 | void |
|
|
3550 | ev_async_start (EV_P_ ev_async *w) |
|
|
3551 | { |
|
|
3552 | if (expect_false (ev_is_active (w))) |
|
|
3553 | return; |
|
|
3554 | |
|
|
3555 | evpipe_init (EV_A); |
|
|
3556 | |
|
|
3557 | EV_FREQUENT_CHECK; |
|
|
3558 | |
|
|
3559 | ev_start (EV_A_ (W)w, ++asynccnt); |
|
|
3560 | array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); |
|
|
3561 | asyncs [asynccnt - 1] = w; |
|
|
3562 | |
|
|
3563 | EV_FREQUENT_CHECK; |
|
|
3564 | } |
|
|
3565 | |
|
|
3566 | void |
|
|
3567 | ev_async_stop (EV_P_ ev_async *w) |
|
|
3568 | { |
|
|
3569 | clear_pending (EV_A_ (W)w); |
|
|
3570 | if (expect_false (!ev_is_active (w))) |
|
|
3571 | return; |
|
|
3572 | |
|
|
3573 | EV_FREQUENT_CHECK; |
|
|
3574 | |
|
|
3575 | { |
|
|
3576 | int active = ev_active (w); |
|
|
3577 | |
|
|
3578 | asyncs [active - 1] = asyncs [--asynccnt]; |
|
|
3579 | ev_active (asyncs [active - 1]) = active; |
|
|
3580 | } |
|
|
3581 | |
|
|
3582 | ev_stop (EV_A_ (W)w); |
|
|
3583 | |
|
|
3584 | EV_FREQUENT_CHECK; |
|
|
3585 | } |
|
|
3586 | |
|
|
3587 | void |
|
|
3588 | ev_async_send (EV_P_ ev_async *w) |
|
|
3589 | { |
|
|
3590 | w->sent = 1; |
|
|
3591 | evpipe_write (EV_A_ &async_pending); |
|
|
3592 | } |
|
|
3593 | #endif |
|
|
3594 | |
|
|
3595 | /*****************************************************************************/ |
|
|
3596 | |
|
|
3597 | struct ev_once |
|
|
3598 | { |
|
|
3599 | ev_io io; |
|
|
3600 | ev_timer to; |
|
|
3601 | void (*cb)(int revents, void *arg); |
|
|
3602 | void *arg; |
|
|
3603 | }; |
|
|
3604 | |
|
|
3605 | static void |
|
|
3606 | once_cb (EV_P_ struct ev_once *once, int revents) |
|
|
3607 | { |
|
|
3608 | void (*cb)(int revents, void *arg) = once->cb; |
|
|
3609 | void *arg = once->arg; |
|
|
3610 | |
|
|
3611 | ev_io_stop (EV_A_ &once->io); |
|
|
3612 | ev_timer_stop (EV_A_ &once->to); |
|
|
3613 | ev_free (once); |
|
|
3614 | |
|
|
3615 | cb (revents, arg); |
|
|
3616 | } |
|
|
3617 | |
|
|
3618 | static void |
|
|
3619 | once_cb_io (EV_P_ ev_io *w, int revents) |
|
|
3620 | { |
|
|
3621 | struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)); |
|
|
3622 | |
|
|
3623 | once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to)); |
|
|
3624 | } |
|
|
3625 | |
|
|
3626 | static void |
|
|
3627 | once_cb_to (EV_P_ ev_timer *w, int revents) |
|
|
3628 | { |
|
|
3629 | struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)); |
|
|
3630 | |
|
|
3631 | once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); |
|
|
3632 | } |
|
|
3633 | |
|
|
3634 | void |
|
|
3635 | ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) |
|
|
3636 | { |
|
|
3637 | struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); |
|
|
3638 | |
|
|
3639 | if (expect_false (!once)) |
|
|
3640 | { |
|
|
3641 | cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); |
|
|
3642 | return; |
|
|
3643 | } |
|
|
3644 | |
|
|
3645 | once->cb = cb; |
|
|
3646 | once->arg = arg; |
|
|
3647 | |
|
|
3648 | ev_init (&once->io, once_cb_io); |
|
|
3649 | if (fd >= 0) |
|
|
3650 | { |
|
|
3651 | ev_io_set (&once->io, fd, events); |
|
|
3652 | ev_io_start (EV_A_ &once->io); |
|
|
3653 | } |
|
|
3654 | |
|
|
3655 | ev_init (&once->to, once_cb_to); |
|
|
3656 | if (timeout >= 0.) |
|
|
3657 | { |
|
|
3658 | ev_timer_set (&once->to, timeout, 0.); |
|
|
3659 | ev_timer_start (EV_A_ &once->to); |
|
|
3660 | } |
|
|
3661 | } |
|
|
3662 | |
|
|
3663 | /*****************************************************************************/ |
|
|
3664 | |
|
|
3665 | #if EV_WALK_ENABLE |
|
|
3666 | void |
|
|
3667 | ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) |
|
|
3668 | { |
|
|
3669 | int i, j; |
|
|
3670 | ev_watcher_list *wl, *wn; |
|
|
3671 | |
|
|
3672 | if (types & (EV_IO | EV_EMBED)) |
|
|
3673 | for (i = 0; i < anfdmax; ++i) |
|
|
3674 | for (wl = anfds [i].head; wl; ) |
328 | { |
3675 | { |
329 | *head = elem->next; |
3676 | wn = wl->next; |
330 | return; |
3677 | |
|
|
3678 | #if EV_EMBED_ENABLE |
|
|
3679 | if (ev_cb ((ev_io *)wl) == embed_io_cb) |
|
|
3680 | { |
|
|
3681 | if (types & EV_EMBED) |
|
|
3682 | cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io)); |
|
|
3683 | } |
|
|
3684 | else |
|
|
3685 | #endif |
|
|
3686 | #if EV_USE_INOTIFY |
|
|
3687 | if (ev_cb ((ev_io *)wl) == infy_cb) |
|
|
3688 | ; |
|
|
3689 | else |
|
|
3690 | #endif |
|
|
3691 | if ((ev_io *)wl != &pipe_w) |
|
|
3692 | if (types & EV_IO) |
|
|
3693 | cb (EV_A_ EV_IO, wl); |
|
|
3694 | |
|
|
3695 | wl = wn; |
331 | } |
3696 | } |
332 | |
3697 | |
333 | head = &(*head)->next; |
3698 | if (types & (EV_TIMER | EV_STAT)) |
334 | } |
3699 | for (i = timercnt + HEAP0; i-- > HEAP0; ) |
335 | } |
3700 | #if EV_STAT_ENABLE |
336 | |
3701 | /*TODO: timer is not always active*/ |
337 | static void |
3702 | if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb) |
338 | ev_start (struct ev_watcher *w, int active) |
3703 | { |
339 | { |
3704 | if (types & EV_STAT) |
340 | w->pending = 0; |
3705 | cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer)); |
341 | w->active = active; |
3706 | } |
342 | } |
|
|
343 | |
|
|
344 | static void |
|
|
345 | ev_stop (struct ev_watcher *w) |
|
|
346 | { |
|
|
347 | if (w->pending) |
|
|
348 | pendings [w->pending - 1].w = 0; |
|
|
349 | |
|
|
350 | w->active = 0; |
|
|
351 | /* nop */ |
|
|
352 | } |
|
|
353 | |
|
|
354 | void |
|
|
355 | evio_start (struct ev_io *w) |
|
|
356 | { |
|
|
357 | if (ev_is_active (w)) |
|
|
358 | return; |
|
|
359 | |
|
|
360 | int fd = w->fd; |
|
|
361 | |
|
|
362 | ev_start ((struct ev_watcher *)w, 1); |
|
|
363 | array_needsize (anfds, anfdmax, fd + 1, anfds_init); |
|
|
364 | wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w); |
|
|
365 | |
|
|
366 | ++fdchangecnt; |
|
|
367 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
368 | fdchanges [fdchangecnt - 1] = fd; |
|
|
369 | } |
|
|
370 | |
|
|
371 | void |
|
|
372 | evio_stop (struct ev_io *w) |
|
|
373 | { |
|
|
374 | if (!ev_is_active (w)) |
|
|
375 | return; |
|
|
376 | |
|
|
377 | wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); |
|
|
378 | ev_stop ((struct ev_watcher *)w); |
|
|
379 | |
|
|
380 | ++fdchangecnt; |
|
|
381 | array_needsize (fdchanges, fdchangemax, fdchangecnt, ); |
|
|
382 | fdchanges [fdchangecnt - 1] = w->fd; |
|
|
383 | } |
|
|
384 | |
|
|
385 | void |
|
|
386 | evtimer_start (struct ev_timer *w) |
|
|
387 | { |
|
|
388 | if (ev_is_active (w)) |
|
|
389 | return; |
|
|
390 | |
|
|
391 | if (w->is_abs) |
|
|
392 | { |
|
|
393 | /* this formula differs from the one in timer_reify becuse we do not round up */ |
|
|
394 | if (w->repeat) |
|
|
395 | w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; |
|
|
396 | } |
|
|
397 | else |
3707 | else |
398 | w->at += ev_now; |
3708 | #endif |
|
|
3709 | if (types & EV_TIMER) |
|
|
3710 | cb (EV_A_ EV_TIMER, ANHE_w (timers [i])); |
399 | |
3711 | |
400 | ev_start ((struct ev_watcher *)w, ++timercnt); |
3712 | #if EV_PERIODIC_ENABLE |
401 | array_needsize (timers, timermax, timercnt, ); |
3713 | if (types & EV_PERIODIC) |
402 | timers [timercnt - 1] = w; |
3714 | for (i = periodiccnt + HEAP0; i-- > HEAP0; ) |
403 | upheap (timercnt - 1); |
3715 | cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); |
404 | } |
3716 | #endif |
405 | |
3717 | |
406 | void |
3718 | #if EV_IDLE_ENABLE |
407 | evtimer_stop (struct ev_timer *w) |
3719 | if (types & EV_IDLE) |
408 | { |
3720 | for (j = NUMPRI; i--; ) |
409 | if (!ev_is_active (w)) |
3721 | for (i = idlecnt [j]; i--; ) |
410 | return; |
3722 | cb (EV_A_ EV_IDLE, idles [j][i]); |
|
|
3723 | #endif |
411 | |
3724 | |
412 | if (w->active < timercnt--) |
3725 | #if EV_FORK_ENABLE |
413 | { |
3726 | if (types & EV_FORK) |
414 | timers [w->active - 1] = timers [timercnt]; |
3727 | for (i = forkcnt; i--; ) |
415 | downheap (w->active - 1); |
3728 | if (ev_cb (forks [i]) != embed_fork_cb) |
416 | } |
3729 | cb (EV_A_ EV_FORK, forks [i]); |
|
|
3730 | #endif |
417 | |
3731 | |
418 | ev_stop ((struct ev_watcher *)w); |
3732 | #if EV_ASYNC_ENABLE |
419 | } |
3733 | if (types & EV_ASYNC) |
|
|
3734 | for (i = asynccnt; i--; ) |
|
|
3735 | cb (EV_A_ EV_ASYNC, asyncs [i]); |
|
|
3736 | #endif |
420 | |
3737 | |
421 | void |
3738 | #if EV_PREPARE_ENABLE |
422 | evsignal_start (struct ev_signal *w) |
3739 | if (types & EV_PREPARE) |
423 | { |
3740 | for (i = preparecnt; i--; ) |
424 | if (ev_is_active (w)) |
3741 | # if EV_EMBED_ENABLE |
425 | return; |
3742 | if (ev_cb (prepares [i]) != embed_prepare_cb) |
426 | |
|
|
427 | ev_start ((struct ev_watcher *)w, 1); |
|
|
428 | array_needsize (signals, signalmax, w->signum, signals_init); |
|
|
429 | wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w); |
|
|
430 | } |
|
|
431 | |
|
|
432 | void |
|
|
433 | evsignal_stop (struct ev_signal *w) |
|
|
434 | { |
|
|
435 | if (!ev_is_active (w)) |
|
|
436 | return; |
|
|
437 | |
|
|
438 | wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w); |
|
|
439 | ev_stop ((struct ev_watcher *)w); |
|
|
440 | } |
|
|
441 | |
|
|
442 | /*****************************************************************************/ |
|
|
443 | #if 1 |
|
|
444 | |
|
|
445 | static void |
|
|
446 | sin_cb (struct ev_io *w, int revents) |
|
|
447 | { |
|
|
448 | fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); |
|
|
449 | } |
|
|
450 | |
|
|
451 | static void |
|
|
452 | ocb (struct ev_timer *w, int revents) |
|
|
453 | { |
|
|
454 | fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); |
|
|
455 | } |
|
|
456 | |
|
|
457 | int main (void) |
|
|
458 | { |
|
|
459 | struct ev_io sin; |
|
|
460 | |
|
|
461 | ev_init (0); |
|
|
462 | |
|
|
463 | evw_init (&sin, sin_cb, 55); |
|
|
464 | evio_set (&sin, 0, EV_READ); |
|
|
465 | evio_start (&sin); |
|
|
466 | |
|
|
467 | struct ev_timer t[1000]; |
|
|
468 | |
|
|
469 | int i; |
|
|
470 | for (i = 0; i < 1000; ++i) |
|
|
471 | { |
|
|
472 | struct ev_timer *w = t + i; |
|
|
473 | evw_init (w, ocb, i); |
|
|
474 | evtimer_set_rel (w, drand48 (), 0); |
|
|
475 | evtimer_start (w); |
|
|
476 | if (drand48 () < 0.5) |
|
|
477 | evtimer_stop (w); |
|
|
478 | } |
|
|
479 | |
|
|
480 | ev_loop (0); |
|
|
481 | |
|
|
482 | return 0; |
|
|
483 | } |
|
|
484 | |
|
|
485 | #endif |
3743 | # endif |
|
|
3744 | cb (EV_A_ EV_PREPARE, prepares [i]); |
|
|
3745 | #endif |
486 | |
3746 | |
|
|
3747 | #if EV_CHECK_ENABLE |
|
|
3748 | if (types & EV_CHECK) |
|
|
3749 | for (i = checkcnt; i--; ) |
|
|
3750 | cb (EV_A_ EV_CHECK, checks [i]); |
|
|
3751 | #endif |
487 | |
3752 | |
|
|
3753 | #if EV_SIGNAL_ENABLE |
|
|
3754 | if (types & EV_SIGNAL) |
|
|
3755 | for (i = 0; i < EV_NSIG - 1; ++i) |
|
|
3756 | for (wl = signals [i].head; wl; ) |
|
|
3757 | { |
|
|
3758 | wn = wl->next; |
|
|
3759 | cb (EV_A_ EV_SIGNAL, wl); |
|
|
3760 | wl = wn; |
|
|
3761 | } |
|
|
3762 | #endif |
488 | |
3763 | |
|
|
3764 | #if EV_CHILD_ENABLE |
|
|
3765 | if (types & EV_CHILD) |
|
|
3766 | for (i = (EV_PID_HASHSIZE); i--; ) |
|
|
3767 | for (wl = childs [i]; wl; ) |
|
|
3768 | { |
|
|
3769 | wn = wl->next; |
|
|
3770 | cb (EV_A_ EV_CHILD, wl); |
|
|
3771 | wl = wn; |
|
|
3772 | } |
|
|
3773 | #endif |
|
|
3774 | /* EV_STAT 0x00001000 /* stat data changed */ |
|
|
3775 | /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */ |
|
|
3776 | } |
|
|
3777 | #endif |
489 | |
3778 | |
|
|
3779 | #if EV_MULTIPLICITY |
|
|
3780 | #include "ev_wrap.h" |
|
|
3781 | #endif |
|
|
3782 | |
|
|
3783 | #ifdef __cplusplus |
|
|
3784 | } |
|
|
3785 | #endif |
|
|
3786 | |